Campervan storage near Bishops Waltham, Hampshire

Google it. Just ask for caravan storage near ( your postcode ) and see what comes up. 

 thanks, have done that and have a couple of places I will ring, just thought I'd ask here, nothing like word of mouth.

If that doesn't produce anything, a GoogleEarth survey might reveal a local farmer with some suitable storage area that they may be willing to accommodate you. Not sure how that would affect your insurance though.

Marquis is just down the road. I don't think they do storage but there is storage yard behind their premises that might be worth investigating.