I’m sure you’ve seen this but the CDRPs in Shropshire have a full crime mapping package

http://caddie.shropshire.gov.uk

I think it’s worth pointing out that this was set up at divisional, not force level (West Mercia Constabulary covers Shropshire, Telford and Wrekin, Herefordshire and Worcestershire). It includes ASB and fire crime data.

So it could be done by a single Borough in London…