Yes. You can walk in at 117a Harley Street seven days a week without an appointment or a GP referral; booking online just guarantees your time. At our clinic, 55% of blood-test appointments were booked for the same day. Most routine results come back in 1 day.
Key takeaways
- You can walk in at 117a Harley Street seven days a week without an appointment or a GP referral.
- At our clinic, 55% of blood-test appointments were booked for the same day and 70% for the same or next day.
- Booking online guarantees your time; walking in means you're seen when there is capacity.
- Every test price is shown plus a one-off £50 blood draw fee, added once per visit.
- At our clinic, Monday is the busiest day and bookings peak around 11:00, so a visit from Tuesday onwards, away from late morning, tends to be quieter.
- Results are sent by email, with an optional £75 doctor review if you'd like them explained.
Walk in or book online?
Both work. Walking in means you're seen when there's capacity that day; booking online reserves your time and lets you choose your tests in advance. There's no GP referral needed either way, and every test price is shown before you go, plus the £50 blood draw.
| Walk in | Book online | |
|---|---|---|
| Appointment needed | No | No, but it secures your time |
| How soon you're seen | Depends on capacity at that moment | Your time is guaranteed |
| Choosing your tests | At reception on arrival | When you book |
| Price | Same either way, plus the £50 blood draw | Same either way, plus the £50 blood draw |
Neither option needs a referral from your GP, so the choice really comes down to certainty. If your morning is tightly booked around the appointment, reserving a time online removes the guesswork; if you're passing Harley Street and have a spare half hour, walking in works just as well when the clinic has capacity.
When it is quietest
At our clinic, Monday is the busiest day for blood tests and bookings peak around 11:00. A visit from Tuesday onwards, away from late morning, tends to be quieter, though this isn't a guarantee. At our clinic, 19% of blood-test appointments were at weekends.
Weekends are a genuine option too: the clinic is open Saturday and Sunday, 10:00 to 14:00.
What to bring and how to prepare
You don't need a referral letter; just come along during opening hours. Most tests need no special preparation, though some do need fasting; check whether you need to fast before you come in if you're not sure. If you're testing testosterone, come for a morning sample, ideally before 10:00.
What it costs
Every test price on Blood London is shown plus a one-off £50 blood draw fee, charged once per visit no matter how many tests you have. A full blood count is £63.75, a vitamin D blood test is £108.75, both reporting in 1 day, and the Silver blood profile is £124, reporting in 24 hours.
The £50 fee covers the phlebotomist's time and is added once per visit, so choosing several tests in the same visit doesn't multiply the draw fee.
Getting your results
Results are sent to you by email once they're ready, so there's no need to wait for a call. Add a doctor review to your test for £75 if you'd like it explained, or if you'd rather a doctor choose your tests from the outset, book a same-day blood test with a GP at Medical Express Clinic.
Most routine results come back within 1 day of your sample reaching the laboratory; the detail on how long results take by test type is covered in our results-timing guide. Blood London is a walk-in and book-ahead option for private blood tests in London.
Walk in or book a blood test at 117a Harley Street.
Frequently asked questions
Do I need a GP referral?
No. You can walk in or book online without a referral from your GP.
Can I walk in on a Sunday?
Yes. The clinic is open Saturday and Sunday, 10:00 to 14:00, as well as Monday to Friday, 09:00 to 18:00.
Do I need to fast?
Only for some tests. Most don't need any preparation, but check the individual test before you come in if you're not sure.
How long does the blood draw take?
A few minutes.
Can I choose tests when I arrive?
Yes, you can choose your tests at reception when you arrive, or select them in advance when you book online.
Can a doctor explain my results?
Yes, you can add a doctor review to your test for £75.