Marjorie Lofthouse looks at this year's finalists of Radio 4's competition for the most enterprising small business. 5:
Isoflex Jack Touzel and Douglas Todd run a company specialising in solving the problem of leaking roofs with a new solution for waterproofing.
Producer JOCK GALLAGHER BBC Birmingham
The judges for the Enterprise competition are Stuart Young ,
Chairman of the BBC: Alan Stote ,
Chairman of the CBI's Smaller Firms Council, and Georgina Von Etzdorf and John Nettleton (joint winners of the 1984 award)