Hi
Thanks for the information about OFT.
I believe as long as you have a current JAA license and medical you dont need a FAA medical.
As apart of the verification process the CAA release your license and medical certificate validation and currency information to the FAA.
The FAA then confirm this in writing to you.
So then when you arrive in the states you should take along your JAA license, JAA medical certificate that are current along with the letter from the FAA confirming this the flight standards office to collect the temp american license.
I believe then after 120 days, the FAA provide you with a U.S license.
Also regarding the medical certificate.
I believe that if you have a foreign license that has the license and medical certificate on one piece of paper and the medical has expired, you have to renew this in your license issueing country.
But if the license and medical are seperate documents, which U.K JAA PPL licenses are and the medical has expired. It is possible to get a FAA medical certificate.