Sorry MtB I copied the name from the post title, however, I checked Wheaton Aston on Wiki and no mention of a toilet block in the village's amenities (see below). Possibly if you don't know Wheaton Ashton you should be made to travel the network until you find it like Jason and the Argonauts and the golden fleece or something, but more likely you're right and I'm wrong which would appear to be the case.
Amenities
Although in the heart of the South Staffordshire countryside there are many amenities for the local population including two pubs, The Hartley Arms and the Coach and Horses (which also provides accommodation for a cafe/sandwich shop), Wheaton Aston and Lapley Recreation Ground, post office, paper shop, general store, a garage-cum-chandlery-cum-hardware shop (Turners), a motor engineers (Hinsley's) and a couple of farms (The Bridge and Whitegates) who also sell their produce direct to the public.[3]
There is one school in the village, St. Mary's CE© First School, which has a total intake of roughly 100 children.[4]