using a proxy wont even work. i have tried recovering an account from us because thats where im from. i am in the uk for 3 years. it wouldnt let me do it. so i tried a usa proxy in same state that im from. got denied still. so i just had my cousin do it from his computer and it worked. any company like jagex or yahoo or anything like that knows when a proxy is being used. you can determine if an ip is a proxy just by looking it up. there really isnt much you can honestly do with this. you could....
1. give all your information to recover your level 138 to a random person and they can attempt/do a recovery for you. (this leaves your account in the hands of someone else)
2. pay someone who is trusted in the uk and give all your information to reocver your level 138 (this leaves your account in the hands of someone else also)
3. use team viewer with someone in uk and knowing about 80% of people here on sythe they would set up a keylogger on there computer so they will capture your information anyways.
4. have someone set up a ssh that is in the uk and you just connect to there ip and do it from your computer (like a proxy except its legit ip from someones home in uk)
thats best i can think of.