Part Suitability (often shortened to APP SUI in Home Office drafting) is the cross-cutting block of the Immigration Rules that decides whether an applicant is suitable for entry clearance or permission — separate from route-specific eligibility. From 8 October 2026, HC 584 makes a focused change: prior conduct that frustrates immigration controls is brought expressly into the definition of a breach of immigration laws in SUI 11.4.

That matters for people applying inside the UK as well as from overseas. It is not a full encyclopedia of every refusal ground in Part Suitability.

General information as at 9 September 2026. It is not advice on your facts. Worldwide Immigration Ltd is an IAA-regulated immigration advice organisation (Ref F201900032). Advisers are not SRA-regulated solicitors.

The HC 584 change in one paragraph

HC 584 amends SUI 11.4 so that, after the existing limbs (overstaying, condition breach, illegal entry, deception in a previous application), a new limb is added:

> (e) acted to frustrate immigration controls as set out in SUI 11.7.

SUI 11.7 already explained what “acted to frustrate immigration controls” means. The Rules change does not invent a brand-new concept from scratch. It classifies that conduct as a breach of immigration laws under SUI 11.4, so the breach framework — including discretionary refusal of permission applications under SUI 11.3 — can catch it more clearly for applicants who are already in the UK.

Sources: HC 584 accessible (SUI1–SUI2); Explanatory Memorandum HC 584 (para 5.1); Immigration Rules: Part Suitability.

What the Explanatory Memorandum says the change is for

Paragraph 5.1 of the Explanatory Memorandum is blunt:

  • - An applicant will additionally be classed as having been in breach of immigration laws if they previously acted to frustrate immigration controls.
  • - The purpose is to ensure the provisions apply equally to people in the UK and to people outside the UK applying for entry clearance.
  • - In practical terms, applicants in the UK who previously failed to report for bail or absconded from bail or custody can now be refused on that basis under this breach framing.

So the newsjack angle is not “suitability exists for the first time”. It is alignment of in-UK and entry-clearance treatment for frustration-type conduct. The practical significance is particularly for in-country permission-to-stay applications — the Explanatory Memorandum’s core point.

What SUI 11.7 already lists (examples)

SUI 11.7 says an applicant aged 18 or over will be treated as having acted to frustrate immigration controls if they, for example:

  • - failed to cooperate with the redocumentation, arrest or removal process; or
  • - used a false identity; or
  • - failed to report as required or absconded from immigration custody or bail; or
  • - obtained state or public authority benefits, tax credits, employment, rented accommodation in the private sector or goods or services they were not entitled to; or
  • - used multiple identities; or
  • - participated in immigration-related crime.

Those examples sit in the live Part Suitability text. They are examples, not an exhaustive list. HC 584’s operative insert is the new SUI 11.4(e) cross-reference — not a rewrite of SUI 11.7 itself.

How this sits next to the rest of SUI 11 (without turning into a textbook)

Keep three neighbouring paragraphs in view:

  • - SUI 11.1 — mandatory refusal of entry clearance / permission to enter where there was a previous breach (as defined in SUI 11.4) and the application is inside the relevant mandatory refusal period (re-entry ban) in SUI 12.1.
  • - SUI 11.2 — discretionary refusal of entry clearance / permission to enter outside the mandatory refusal period where there was a previous breach and the applicant has acted to frustrate immigration controls (see SUI 11.7).
  • - SUI 11.3 — an application for entry clearance or permission may be refused where the applicant is, or has been, in breach of immigration laws as defined in SUI 11.4.

HC 584 expressly brings frustration conduct within the SUI 11.4 breach definition. That can then engage the discretionary refusal power in SUI 11.3 for permission applications — including in-country permission to stay. That is the in-UK scope point the Explanatory Memorandum emphasises.

This article stops there. It does not walk every criminality, deception, NHS debt, or sponsorship-cancellation ground in Part Suitability.

Timing and transitional protection

APP SUI1 and APP SUI2 take effect on 8 October 2026. For those changes, if an application for entry clearance, ETA, permission to enter or stay, a claim, or administrative review was made before 8 October 2026, it is decided under the Rules in force on 7 October 2026.

That transitional wording is important for pending family, private life, long residence, work and study applications that may be decided after 8 October. Applications lodged on or after 8 October will meet the amended SUI 11.4.

Who should care (and who should not panic)

Higher relevance

  • - Family applications under Appendix FM (partners, parents, children) where there is any history of bail non-reporting, absconding, removal non-cooperation, false identity, or similar.
  • - Private life and long residence permission / settlement cases where there is a history of immigration enforcement, reporting failures, absconding, false identity or removal non-cooperation.
  • - Sponsored workers and students with historic enforcement contact — suitability can still bite even when sponsorship is clean.
  • - Entry clearance applicants who already knew SUI 11.2 existed, but whose UK-based relatives are applying to stay.

Lower relevance for this spoke

  • - Straightforward first-time applicants with no enforcement history.
  • - Readers looking for a complete “grounds for refusal” commentary — that is a different (much longer) product.

If your history includes reporting failures or absconding, do not leave it unspoken in a new application after 8 October. Decision makers will have a clearer Rules hook.

Practical preparation points

  1. 1. Get the chronology straight. Dates of bail conditions, reporting requirements, absences from reporting, detention, or removal steps matter.
  2. 2. Evidence compliance since. Where there was a past problem, show later cooperation, reporting, and stability.
  3. 3. Do not confuse the mandatory refusal period with discretionary in-UK refusal. SUI 11.1 is mandatory refusal of entry clearance / permission to enter within the mandatory refusal period (re-entry ban) in SUI 12.1. SUI 11.3 is the broader discretionary breach provision for permission applications (including in-country stay).
  4. 4. Route choice still matters. Suitability sits beside eligibility. Fixing a family or long residence eligibility pack does not erase a SUI problem.
  5. 5. Human rights overlay. Part Suitability itself notes that where refusal would be incompatible with ECHR obligations, route-specific Rules set the approach. That is case-specific advice territory — not something this overview can decide.

Service links (money pages only)

Family applications are the natural primary CTA for this cross-cutting change: Bring family to the UK.

Where the underlying route is long residence or sponsorship, see also Long residence applications and Sponsor licence.

Call 020 3488 2308 or email info@worldwideimmigration.co.uk for regulated case advice (IAA Ref F201900032).

Frequently asked questions

Does this create a new automatic refusal for everyone who ever missed a reporting appointment?

No. A single missed reporting appointment does not automatically result in refusal. The Home Office must first consider whether the conduct falls within SUI 11.7 (examples of frustration), and then whether discretionary refusal under SUI 11.3 is appropriate on the facts. Automatic language belongs to other SUI paragraphs (for example certain criminality and exclusion grounds) — not this HC 584 insert alone.

I am applying from inside the UK. Did frustration conduct matter before?

SUI 11.7 and SUI 11.2 already existed in the Rules architecture, with SUI 11.2 aimed at entry clearance / permission to enter outside the mandatory refusal period. The Explanatory Memorandum’s point is that classifying frustration under SUI 11.4 ensures equal treatment so in-UK applicants with bail/reporting/absconding history can be refused on that breach basis — particularly for in-country permission-to-stay applications.

Does transitional protection help me?

Only if your relevant application, claim or administrative review was made before 8 October 2026. Those are decided under the 7 October Rules for this change. Later applications are not.

Will you list every Part Suitability ground here?

No. This spoke owns the HC 584 SUI 11.4(e) / in-UK frustration alignment only.

Sources (GOV.UK)