From Duxford I'd go Woburn, Oxford (aim for Cowley which is on the eastern edge and easy to spot) Newbury, Chilbolton (Radio telescope, easy to spot) Alderbury VRP, Compton Abbas
That's a low level VFR route with nothing complicated about it and good ground features.
At a weekend you're unlikely to get an answer from Boscombe so it will be blind calls inside the CMATZ to let their flying club know what you're up to.
Careful Mike, you'll annoy the jargon police
