Because on the whole the Ford "scene" in the UK is about giving it the biggun about how great your car is and how well you can drive, bangin on about hanging the ass out everywhere, but not doing it.
There a few lowish spec sierras competing in BDC, and in Ireland there are a few Fords competing in Prodrift and D-rift, inc Mk1+2 Escorts, a 3dr Cossie, and Cossie powered E36 BMW and Volvo 740.
But even at a practice day you rarely see any Fords, even though Sierras etc are ideal.