currently using a Filco MJ2 TKL with browns and hoping to eventually tart it up when I can find a nice ISO key set to top off with *fingers crossed. A brocap
Recommendations for ISO key sets always welcome folks
Mechsupply and UKKeycaps are both ran by the same guy, and they stock a few different variants of TaiHao sets with UK support for pretty decent prices. He also does GBs for switches, cases and stuff every once in a while.
The next step up would be groupbuys. A lot of SP GBs tend to have ISO-UK as one of the child kits. GMK is rarer to have full support, normally a token effort is expended in the form of 4 extra keys (ISO Enter, 1.25u Shift, and 1u in R4 and R3), but there are sets out there with full UK support.
I recommend getting in the GMK Hydro GB, it's got ISO-UK support!