I'm in London. I've had two recent aborted attempts. First in March 2019, where with my FAA letter I had an appointment at the NY Garden City FSDO. Had to cancel my trip at last minute for family reasons. Then in February 2020, I got my second FAA letter. NY Garden City FSDO no longer viable, nor Teterboro. Was given a list of DPE's, one of which was happy to do the paperwork for USD 250 on my visit in April 2020. The pandemic meant that trip was cancelled. The process overall is really quick. Submitted SRG1160 and AC8060-71 on 7th September 2018, verification letter from FAA on 19th September. Then in 2020, submissions on 21st February, verification letter on 9th March. You also need to fill out IACRA. Lots of good FAA Safety Material / etc to get up to speed on as well. There are some well known European/UK DPEs (you can find with Google search), but I preferred to go NY. I also lined up a BFR on Long Island and then had planned to rent a PA28R and fly it up to Maine.