MicKPM
ClioSport Trader
Clio16v/Zoe Z.E.50
I use it when ever I can (look for any card terminal with a flashing/steady green light in the top left corner... or signs in the windows) but i've never tried it via my Watch yet, that just seems a little "Apple wanker" to me. I believe they banks are raising the transaction limit shortly to £30.