Hi
I can answer my own question now.
John Mothersole was the son of Simon Mothersole, being baptised in Livermere Magna on 21 November 1777 along with his sister Frances.
Simon Mothersole is mentioned in both of their marriages:
John Mothersole, of Gt. Livermere, s. m., & Mary Ann Farrow, of Sapiston, s. w., at same. Surety: Simon Mothersole, of same. 18 Dec 1816. Book: 12.The Hearth Tax. Charles 2nd.
Collection: Suffolk: Sudbury - Marriage Licences, 1815-1839
Jas. Barker, of Felsham, s. m., & Francis Mothersole, of Livermere Magna, s. w., at same. Surety: Simon Mothersole, gent. 04 Nov 1805.
Book: 12.The Hearth Tax. Charles 2nd.
Collection: Suffolk: Sudbury - Marriage Licences, 1782-1814
Simon Mothersole was a farmer, don't think he owned his land, but leased/rented it.
The Bury and Norwich Post: Or, Suffolk, Norfolk, Essex, and Cambridge Advertiser (Bury Saint Edmunds, England), Wednesday, February 17, 1802; pg. [1]; Issue 1025. 19th Century British Library Newspapers: Part II.
To be Sold: Two inclosures of excellent Freehold Arable land, containing 16 acres, more or less, lying and being in Great Livermere, in the County of Suffolk; in the occupation of Mr. Simon Mothersole under an agreement which expires at Michaelmas.
Tom