Thanks again. Is
https://zasilenia.samiswoi.pl/ the top up page?
I ought to have thought about a calling card too, but that's another thread!
Prepaids - FR: SFR; BE: BASE; PL:iPlus simdata UK: T-Mobile; International: SIM4Travel / Trupphone
Contract - UK: O2
Phones - Nokia 700
Phones in store - Nokia 5100, 3230, N70, 5500, N96, N95, 6230, 1100