No news, sorry.
Next door had some cctv coverage of a dubious motor but despite promises have not given me the footage. The Police have promised to look at cctv locally but have not got back to me and have not asked where the coverage promised from next door is. Useless!
All I can add is the advice to consider tracking devices, removing batteries, installing those bollards you can put in concrete etc but in the end if the crooks want a van I guess they'll take it one way or another.