Hi Mark,
I read that you also have a rotten battery-tray. Well mine is done as well, it goes as far as the inner wing being rusted through by this as well.
Are these obtainable as spare-part? Shouldn£t be too difficult to manufacture them oneself...
Battery-tray
new battery tray
I've just bought a new battery tray from ex-pressed panels, it cost about £47.00 with P&P, I've not fitted it yet, as I think I'll have a bit more room when I remove the engine (clutch, rocker shafts, water pump, sump etc,etc)