There's been some changes in how to make an appointment here, and the 0203 312 1549 number is no longer valid.
You are redirected to call 0203 312 6626, which seems to be a general number. You're given five options, none of which is the Praed Street Project. I went for option 4, but can't remember now if that was the Winslow or Wharfside clinic! One is for people with follow-up appointments, I think; anyway, you can press * to go back to the main menu, and with option 4 I think I just got through to the main reception desk to make an appointment.
If anyone from PSP reads this - could you confirm that we can no longer book screening appointments through you??