The chronological progression seemed to be present in all of the other galleries. There was no real progression in the prehistory displays. They had European Paleolithic stuff, such as carved batons, in cabinets next to Neolithic stuff.
I came away with the impression that the BM had bunged the meagre display of European prehistory stuff into an available space, which is more of an annex to the existing galleries than an entity in itself.

West Wycombe Hill Fort is worth a look and the West Wycombe/Hell Fire Caves too ... although excavated by local farm workers and Cornish tin miners around the mid 18thC it is likely, at least in part, to Bronze age.

There are occassional standing stones around that area including broken 'sarsen' in many of the local church's ... Chalfont St Giles \; the church is probably on the site of a much earlier symbolic construction and as such, what ever the construction was, it was smashed up and incorporated into the church.

Go to Harrow-on-the-hill too ... and do the Harrow Stone trail from Sudbury golf course to Stanmore Common, whilst not spectacular in a huge enormous sense, if in the area, it's well worth the trip.

In London, the London Stone opposite Cannon Street Station is worth a peek.