Thanks dean101I guess that would be the link between the 40m per week and the 50m+ Solent Runner was suggesting (assuming I build up to it over a few weeks). What pace should I run a 12 miler - goal marathon pace?

Thanks allIt is a tricky balance between getting the miles in (quality miles) and recovering.  I've just tweaked by schedule to get it over 50 miles per week and it is a scary sight.As an example: (4 weeks to go)M: restT: 22m long runW: 4m recoveryTh: restFr: 10 x 800m at 3'15" pace (I am living proof that Yasso 800 is a poor predictor) Sa: 6m easySu: 11m at goal pace (9'09") I've done lots of the predictor tests (eg McMillan) and the usual result is, based on the Half M time, the predicted Marathon time is too fast, whereas I am in fact much faster than predicted at shorter distances ( eg sub 40 10k).I am a 46 year old man, 12 stone (by the end of the training !), 6 foot tall. I do all the right things re hydration/gels during the race. No excuses re conditions - my last race was Berlin (4h15). Previous PB (4h17) was Halstead (which is really hilly). Maybe I should just go back to the 400m hurdles....