The driftwood you see is locked in this calcite and shelly matrix from the Oxford Clay, Peterborough Formation. It is suggested there was landmass to the southeast of the Oxford Clay depositional area, known as the London-Brabant Massif, and that was the source of the driftwood that's found in the Oxford Clay.
What's the chances of finding some borings of a Jurassic saproxylic beetle of some kind in the wood.