Tanvats is a tiny hamlet on the Metheringham Delph. It is shownon the 1890 ordinance survey map of the area. There is a footbridgeacross the delph, a Weslyan Chapel a larger property that appearsto be a farm and a few minor dwellings or cottages.

Tanvats is in Metheringham parish, in the Fen on the bank of a long drain, called Metheringham Delph. The name is self-explanatory; it was a tannery, vats being used for steeping (soaking) the skins. This usually took place a long way from a village because of the obnoxious smell. About 70 years ago there was a small but lively community which had grown up there. It is still isolated, and now almost deserted although it used to have a thriving Methodist chapel, and a school. It had a beer house which the locals said had the longest bar in the country - they had to drink on the bank of the drain! There is a bridge connecting it with Blankney, jocularly know as Tanvats Pier!