Civil Service Fast Stream vs Diplomatic Fast Stream: which career suits you?
Both are Fast Stream schemes chosen in the same application (you can pick up to 3 schemes), with the same first stages: online tests, then a half-day virtual assessment centre. The general Fast Stream schemes move you through postings in different departments across Great Britain; the diplomatic scheme trains you for the FCDO's foreign policy and overseas work, has a scheme-specific final selection board and stricter nationality rules. Fast Stream pay starts at £31,554. Choose diplomatic only if you want a career that includes long postings abroad.
Civil Service Fast Stream vs Diplomatic Fast Stream at a glance
| Civil Service Fast Stream | Diplomatic Fast Stream | |
|---|---|---|
| Full name | Civil Service Fast Stream (Graduate Leadership Programme) | Diplomatic and Development Fast Stream (FCDO) |
| Questions | Stage 1 online tests: Work-Based Scenarios (short video work situations, each with possible actions you rate for effectiveness) and a Case Study Assessment (an evolving scenario with 7 background items and 24 scenario questions, some most/least effective, some rating each action) | Stage 1 online tests: Work-Based Scenarios (video work situations, rate each action) and a Case Study Assessment (7 background items and 24 scenario questions). FSAC: Written Exercise, Oral Briefing Exercise and Personal Development Conversation |
| Time | Online tests are untimed but must be finished within 7 days of release. FSAC is half a day: Written Exercise 55 minutes, Oral Briefing Exercise 45 minutes' preparation plus a 25-minute meeting, Personal Development Conversation 30 minutes | Online tests untimed, 7 days to complete. FSAC half a day: Written Exercise 55 minutes; Oral Briefing 45 minutes' preparation plus 25-minute meeting; Personal Development Conversation 30 minutes. The FSB runs in person in London on set dates (January-February 2027 for DD) |
| Passing score | No pass mark is published. Progression is competitive: each stage is scored against the Fast Stream's 4D framework (Think, Relate, Adapt, Strive) and candidates are moved forward on merit | No pass mark is published. Each stage is scored against the Fast Stream 4D framework (Think, Relate, Adapt, Strive) and candidates progress on merit; DD is one of the most competitive schemes |
| Format | Online tests and FSAC need no specialist knowledge: all information is in the pack, and you are told not to bring in outside knowledge. FSAC is assessed by a different assessor for each exercise, and assessors do not see your application or earlier scores | No diplomatic or policy knowledge is needed for the online tests or FSAC: everything is in the pack, and outside knowledge should not be used. The FSB is scheme-specific and described in the FSB Guide sent with your invitation |
| Cost | No fee | No fee |
| Languages | English | English (language training may follow for overseas postings) |
| Where | All online through the Fast Stream applicant portal: initial application, two untimed online tests at home, an additional-information stage for some schemes, a half-day virtual assessment centre (FSAC) on Google Meet, then a scheme-specific Final Selection Board for most schemes | Fast Stream applicant portal: initial application, two untimed online tests at home, the half-day online Fast Stream Assessment Centre (FSAC), then an in-person Final Selection Board in London, followed by Developed Vetting |
| Level | Civil Service | Civil Service |
What each exam covers
Civil Service Fast Stream
- The Fast Stream, Schemes and Eligibility
- Online Tests: Work-Based Scenarios
- Online Tests: Case Study Assessment
- FSAC: Written Exercise
- FSAC: Oral Briefing Exercise
- Personal Development Conversation and the 4D Framework
- Final Selection Board, Vetting and Pre-Employment Checks
- Application Strategy and Timeline
Diplomatic Fast Stream
- The DD Scheme, Eligibility and Life in the FCDO
- Online Tests: Work-Based Scenarios and Case Study
- FSAC: Written and Oral Briefing Exercises
- Personal Development Conversation and the 4D Framework
- The DD Final Selection Board
- Developed Vetting, Nationality and Residency
- Application Strategy, Motivation and Timeline
- Diplomacy and Development Basics for Candidates
Which should you take?
Both are Fast Stream schemes chosen in the same application (you can pick up to 3 schemes), with the same first stages: online tests, then a half-day virtual assessment centre. The general Fast Stream schemes move you through postings in different departments across Great Britain; the diplomatic scheme trains you for the FCDO's foreign policy and overseas work, has a scheme-specific final selection board and stricter nationality rules. Fast Stream pay starts at £31,554. Choose diplomatic only if you want a career that includes long postings abroad.
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FAQ
What is the difference between Civil Service Fast Stream and Diplomatic Fast Stream?
Both are Fast Stream schemes chosen in the same application (you can pick up to 3 schemes), with the same first stages: online tests, then a half-day virtual assessment centre. The general Fast Stream schemes move you through postings in different departments across Great Britain; the diplomatic scheme trains you for the FCDO's foreign policy and overseas work, has a scheme-specific final selection board and stricter nationality rules. Fast Stream pay starts at £31,554. Choose diplomatic only if you want a career that includes long postings abroad.
Which is harder, Civil Service Fast Stream or Diplomatic Fast Stream?
Civil Service Fast Stream: stage 1 online tests: work-based scenarios (short video work situations, each with possible actions you rate for effectiveness) and a case study assessment (an evolving scenario with 7 background items and 24 scenario questions, some most/least effective, some rating each action) in online tests are untimed but must be finished within 7 days of release. fsac is half a day: written exercise 55 minutes, oral briefing exercise 45 minutes' preparation plus a 25-minute meeting, personal development conversation 30 minutes. Diplomatic Fast Stream: stage 1 online tests: work-based scenarios (video work situations, rate each action) and a case study assessment (7 background items and 24 scenario questions). fsac: written exercise, oral briefing exercise and personal development conversation in online tests untimed, 7 days to complete. fsac half a day: written exercise 55 minutes; oral briefing 45 minutes' preparation plus 25-minute meeting; personal development conversation 30 minutes. the fsb runs in person in london on set dates (january-february 2027 for dd). The longer exam covers more ground, but the harder one is the one further from your daily work. Take both free practice tests to see where you stand.
Can I hold both Civil Service Fast Stream and Diplomatic Fast Stream?
You can prepare for and apply to more than one, and many people do, because the judgement, verbal and numerical tests and the structured interviews overlap a lot. Each organisation runs its own process and vetting, and some roles can't be held at the same time (you can't be a serving regular police officer and a regular in the armed forces, for example), so check the eligibility rules in each job advert.
How do I prepare for Civil Service Fast Stream and Diplomatic Fast Stream?
Start with the free practice test for each, then study by topic. Premium is per exam (£45 a month each), so most people start with the exam they'll sit first and add the second when they're ready.
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Exam details are summarized from recruiting organisations' published information as of November 2026. Confirm with the recruiting organisation before you book. UKCivilServicePrep is an independent career-prep service, not affiliated with or endorsed by any government agency.