For those flyers who find themselves in Madrid without access to an airline-specific lounge, the Cibeles Lounge, Madrid T1 is well worth trying. As far as pay-at-the-desk lounges go, this is one of the best.
If you’re flying from the North Terminal of London’s Gatwick airport you have three choices for lounges if you don’t have an airlines membership that allows you access to one of the airline’s own lounges.
The last time I visited London Stansted airport it was a bit of a mess. That was several years ago and now the (mostly) short haul hub for (mostly) low-cost airlines is looking quite snazzy. It certainly stands head and shoulders about London Luton airport at the moment.