I am about to become divorced from my UK wife (in France).  We both have UK citizenship.  I have a Thai retirement visa and enough money in the bank to renew it.  I have no problems with the police or financial problems of any kind anywhere.  I have no criminal record and have never broken the law anywhere.  I built a house that is in my name on land owned by the woman I want to marry.  I paid for the land and have a usufruct contract with her.  We live in the village of my wife's family in rural Isaan and have been here for about 3 years.    She has been legally divorced for a number of years.  She has one adult son who is married and lives near BKK.

 

What documents will I need to produce to be able to marry this summer?  What conditions must I fulfil to be able to marry here in Thailand?  Her family are all happy about this eventuality and we have a friendly relationship.  I am 69 and she is 53 years of age. Thanks in advance for your help.

You will need to do a affirmation of permit to marry at the UK embassy. Info about doing it and other useful information is here. https://www.gov.uk/marriage-abroad/y/thailand/opposite_sex

You should check with the Amphoe where you will register your marriage to find out what they require.