I have been married to my Thai wife for about 10 years. she has passport in my surname, her Thai id is in my name, the rental agreements are in our name, there is a financial link between my account and hers every month. I earn enough each month to live , I have money in the bank and my own house in the UK. I would be very surprised if my wife - that does not work as she does not need to - would be refused a visa if travelling back to the UK for a holiday if I needed to supply anything