@Genegenie; a UK forum member over on golfgtiforum.co.uk. has very recently received confirmation that his mk7.5 Golf GTI TCR has been built and is in transit. Build of their car was delayed because of the Wolfsburg factory temporary closure due to COVID-19 - they should have got their car late March / early April.
As most UK Golfs are built to customer’s specific requirements and very few built for general VW stock, I daresay that most - if not all - of the remaining mk7.5 Golf production destined for the UK will be cars that are fulfilling existing outstanding customer orders.
VW UK’s website does state that the mk7.5 Golf is available from existing stock only, so that does tend to confirm all mk7.5 production for the UK has probably now stopped, with the exception of the last few outstanding ‘built to order’ customer cars. So if you’re hoping to get one of the last run-out cars from stock you probably need to act fairly soon if you have specific requirements in relation to model, colour, spec, engine, transmission etc.
I‘m with you on the mk8; I hoped it would grow on me but it hasn’t. A link to an interesting YouTube video was recently posted on golfgtiforum.co.uk highlighting the cost cutting measures on the mk8 compared to the mk7.5. The reviewer was quite brutally honest with some of his comments, which in my opinion makes a refreshing change to the comments from some motoring journalists. Worth a watch;