OK, will do some measurement and monitor it.
Find your house on here, and tell me what the soil is:
Superficial deposits: Head – Clay, silt, sand and gravel. Sedimentary superficial deposit formed between 2.588 million years ago and the present during the Quaternary period.
More information
Bedrock geology: Sidmouth Mudstone Formation – Mudstone. Sedimentary bedrock formed between 250 and 228.4 million years ago during the Triassic period.