Thank you all for your replies.

JBA risk management supply data for searches undertaken by solicitors in the conveyancing process.

They assess risk from groundwater and rainwater flooding which supplements the data on flood risk from rivers etc supplied by the Environment agency.

After much discussion it turns out that it is a small dip in the road where Houston Rd meets Woolstone that is raising the flood risk.

For anyone in the same position the standard report looks at area within 25m of your property. You can also get a report for your property and its boundaries only.

In our case it showed the risk was not to our property after all but in fact far enough away from our place not to pose significant risk.

Thank you.