Welton twinned with Monce en Belin signed the charter in 1974.

In May 1944 an aircraft from RAF Scampton crashed in a small wood just outside Monce en Belin and all the crew members were killed. After the war a memorial was erected on the site of the crash.
When a party from France visited the Welton area in 1974 they decided that it was very like Monce and arrangements were eventually made between the two Parish Councils for twinning charters to be signed. The Welton copy is displayed in the Parish office on the Green.

A rural village with a population of around 2500, Monce en Belin lies about 10 KM from Le Mans
(about the the same distance as Welton is from Lincoln). The Church has an unusual tower which bears a clock and the Roman numeral IIII. Although the village has no industry of its own, most of the people work in Le Mans at the various factories, banks, schools etc. It has a new housing estate the main road being called Avenue de Welton and each road leading of this main road is named after a member of the crew of the aircraft that crashed.