So, I finally made up my mind. Muziker had the Hotone Britwind reduced to about £20 lower than anywhere else, and also had the One Control Minimal White switcher, plus the Rockboard ISO 16 power supply, and the Digitech FS3X footswitch to provide additional control to my Whammy DT or Rubberneck. As they charge for postage (but even with postage they were the cheapest), I bought everything at once.
When it all arrives, I will have everything I need to finish my pedalboard (although I may squeeze an overdrive/ boost/ EQ on), as well as what I need to make my floor amp- the Britwind set up with the One Control and an AMT preamp to give me a 3-channel amp I can fit on a smallish board. I believe that the reverb in the Britwind is after the effects loop, so that’s handy. The only thing I might need to look at is getting a clean boost pedal to go last in the signal before the effects return, so I can get a pure volume lift for leads. Not a big issue though.