Ruston BPR Problems Need Cast Iron Welder

Hello All

Went to thurlow at the weekend saturday at 4 oclock diaster struck at the bottom of the barrel water was dripping suspecting a head gasket the engine was stopped and checks were made to the head gasket but nothing was found. peeling the paint back we found the block had a hairline crack. the crack goes across the exhasut side on the barrel so what i ask is does anyone no a good cast iron welder will travel upto a 100 miles from cambridge.

Lewis