There are two versions -
https://geologyviewer.bgs.ac.uk/?_ga=2.75874581.1440108471.1660212257-802806948.1660212257
Click top left and it opens up a side panel where you can choose superficial, bedrock, or combined. Not that much superficial around though, assuming you are indeed in Brizzle...
Not just me then? No information for here either, apart from my own knowledge that it is heavy clay.