Hi Dave,
Suspect the main effect will be to push the price of suitable donors up from around 50 quid to about 1200 quid. Parts should still be available from reclaimation yards it's just the cars will get pricey as people cash in on the increased demand for 'scrappers'! It'll only affect those building a car from single donor or who want age related rather than q plate. Since I beleive the emisions test will be related to age of engine the age related donor thing would have little effect. Reclaimation yards who are half sharp could sell kits of parts from popular donors so I wouldn't panic yet! The classic car mob are getting worked up about it as they see the likelyhood of restorable classics and 'future' classics will get scrapped.
IMHO scrappage incentive is hardly a green thing so the Gov.nment have lost green vote on this in my view and the so called 'friends of the earth' have lost all credibility coming out in support of something that generates more polution and distruction of the planet than re-using and recycling!!!!!
I'll climb down off my soap box now
