I too am a UK Lowryder 2 grower. Planted mine on the 22nd of August and am growing in a north facing (damn it) conservatory just using available light.

The great thing about LR's is that due to their auto flowering nature, as long as you can keep the plant alive (i.e. away from a hard frost, slugs, over/under watering etc) you will get something from them. The bad news is it probably won't be very much.

The drawback with LR's is the yield is very dependant on light, and as the nights here are drawing in your window of opportunity is somewhat limited, however if, as you say, you'd be happy with a few joints worth per plant, then I'm sure you'll be more than pleased with the result.