Spaceport
I see a a spaceport was mentioned too. Fat chance of that happening in the UK as the NIMBY's will be out in force .... and rightly so in this case as a Saturn V launch was 220 db, which would put it in a lot of peoples back yards. On the plus side we wouldn't be going for top 1960's tech so the sound levels wouldn't be as bad. As for the other considerations on where to put a spaceport all they need to do is find some isolated part of the country, as far south as possible with a couple hundred of miles of empty sea to the east. Good luck with that.