Just bring your car over from EU.
You can get insurance from home until you are more settled in UK.
Just a short ferry ride back for the TuV/MoT to budget for.
I wouldn't get a 1000GBP car if you need reliable transport unless you are a DIY mechanic.
Better off using UK car Auction with g-tee remaining on purchased vehicle. EG: Peugoet 307 1.6HDI was 15000GBP new, sold for 5000GBP two years later (admitedly 48000miles on clock but FSH) at auction with 12 months manufacturers g-tee remaining. Low road tax (now CO2 emissions based in UK) and 50+MPG.
have fun!