Lumpjockey, between FL220- FL300, travelling southbound on UA1 you would talk to 132.45 and northbound on UB4 you would talk to 132.6. At FL310 and above UA1 would be 135.42, and UB4 would be 127.42. this is actually south of BPK, north of that is the Daventry sectors- did you want those frequencies?