Thanks for the advice/insight -
Just as an aside I just got a link to a webpage of a guy who's published full details of his local ride - the IMUK Bolton bike route - it's almost as much climbing as Lanza ! - there was I hoping for a faster route and it's Sherborne '08 all over again - never mind - same for all I guess.
If you want a look it's -: http://www.energypics.co.uk/
Back into medium training now and off for a metabolic test tomorrow.