I'm flying JFK-LGW on DL in Y this friday and have about 3 hours to kill before catching BA to GLA. Are there pay showers anywhere in the airport other than in the lounges? I have only general status on DL and BA. I do have a RCC membership for UA but I don't think it will do me any good at Gatwick.

Any suggestions or would either the DL or BA lounge be worth buying a 1-day pass?