Pretty sure one place was guaranteed for the top placed Brit in the inter-continental final. 100% certain that one Swede was guaranteed for 84, one Piole for 86, one Dutchy for Netherlands 87 etc, so can't see why 1985 would have been any different. Of course in the 70s, there were normally at least 4 spots for the host nation.
Edit: I assume you are talking world individual champtionship, which was the only world final at bradford in 85.