Becky's exhaust problem is now cured. I took it to the local independent tyre place I use and they fitted and restudded a replacement exhaust manifold which I supplied courtesy of my local Acclaim guru. A new gasket for the downpipe was fitted and job done! Well worth it for £35.
Turning my attention to Snowdrop, I went down to the garage where the spares 1500 is kept and I took the engine mounts off the Toledo's original engine. I've fitted a fuel filter and with it fitted I can now see why Snowdrop keeps on cutting out. There's a blockage in the fuel line somewhere no doubt caused by the sugar contamination. I've got it all out now so I'll just put in some additive that should hopefully clear the blockage.