British History online says this:
Lisiad de Musters held thirteen bovats in Legreton paying 10s. yearly. Lisiardde Musters (called in 4 R. 1. (fn. 4) de Monasterijs,) gave to the
priory of Thurgarton that bovat of land in Leyton, which was Ulfkells, viz. that which Adam and Ernisheld; Roger de Capella confirmed it, of whom the said Adam and Ernis held it;and so did Henry de Capella. (fn. 5) This was in the year 1328 divided, and Henry deWentelane, and Emme Arnwy, then paid each of them 2s. 2d. for each of them paidhalf a bovat (to the said monastery) in Leverton.
From: 'South Leverton', Thoroton's History of Nottinghamshire: volume 3: Republished with large additions by John Throsby (1796), pp. 270-272. URL:
http://www.british-history.ac.uk/report.aspx?compid=76983 Date accessed: 31 August 2013.
Another quote:
Another notable building in the village is the Priory. Built in 1166 of water quarry stone quarried in the parish, with quoins of dressed stone and walls four feet thick, it is historically connected with the church and is today a nursing home, the staff of which come mainly from the two villages.
So it would seem there was a small Priory there built 12th.C. with 19th. & 20th.C additions & modifications.
Make of it what you will