Thank you for the helpful replies. Kids have british passports so only need £18600. As a Canadian she does not require a visitor visa in advance. I guess the info that I mentioned she will have such as return ticket, Mortgage and car statement, proof of funds and my employment letter, letter from my mother about free place to stay. Will have to do, I can't see them refusing her entry with all of those things to show. Plus she has been in uk before and left without overstaying so she has a good history. I will get her health insurance as well for the visit. I realise that no one can guarantee she will not get turned away, but what I really wanted was to know if there was something really obvious she could also provide that I have not thought of. She knows the law about applying for the spousal visa to. She knows she needs to be back in Canada while it is being processed.