No point in naming/shaming UK1-3, but UK4 was Bournemouth Avionics at Lee-on-Solent, and NL was JP Avionics at EHMZ (Zeeland).
I knew before I got to the bit above it was going to be Bournemouth Av, I contacted them a while back about and upgrade and the guy got right back with quotes and advice on a better and cheaper config, he knew his stuff. Ultimately I decided to delay the upgrade but when I do eventually move forward it will be with those guys.