Pre-built PCs, Simpits & peripherals https://www.richersounds.com/gaming Could be handy if you can't get to Bolton?
If and, only if, RS take care of the customer service and returns, applying their own standards, I might consider going to RS' branch in Exeter, only around 30 minutes away.
RS have a fine reputation, I hope association with Scan doesn't spoil it. We bought our current TV from them.