Is the 60 days Devitt will cover you and your all risk belongings away from home, or do you mean how long Devitt will cover your belongings at home when the house is empty.
Either way I would suggest you look at
www.lv.com - they own what was Frizzel that used to handle Red Pennant for the CMC. If you have more than one policy with them - say home and car - you get a discount on both. Their breakdown cover also knocks spots of the big two as does their travel insurance.
Above all they are based in Bournemouth and ISTR they also have a call centre in Leeds, so you will get a non-script jockey natural English-speaker whenever you call them - and if you do you will realise that LV must spend quite a lot of money on staff training. (Any customer of First Direct reading this will know exactly what I mean!)