Thanks for the suggestions. Distilling early seems to be the easiest option.
This is my first batch through my new distillery, 500 litres of wash in a 1100 L fermenter. I use a lauter tun so there are no grains in the wash. I don't have a cooling jacket on my fermenter and it is closed but not completly sealed.
My previous experience has been in "scotch" style distilleries where they were run on a 7 day cycle. I have not done rye before. The fermentation took off really quickly and this morning (I am in Australia) 2.5 days later the gassing is now very slow and the temperature is dropping. Maybe it will finish in time, another 2.5 days:)
This situation will probably happen again as I am an agricultural contractor and a farmer, so for the future, I will buy another tank so I can hold the wash in my coolstore.- thanks for the cooling suggestion.
I am not so sure about KB's suggestion of leaving agitator running. Having studied micro biology, in theory only, this is likley to increase the breeding of an infection, but in practice maybe not.
Thanks all again for your help.
PeteB