Hi Paul, I have been very happily married to a Turkish woman for 11 years. Like Abi said, just be yourself and all will be fine. She obviously has a westernized outlook on life if she was married to a British guy. However, what ethnic origin was the guy, as the UK is made up of a mix of ethnicity these days. It maybe interesting to know what area of Turkey she is from?, Different areas have different cultures and
customs and may be an idea to study and know a little of her local customs. I promise you that will put you in her good books . Just one thing , not all Turkish men are bad, unfortunately due to media the public only get to know the negative stories and not the 100's of positive and happy stories of mixed Turkish/British relationships.
I am sure it will work out well and good luck.
I wrote a very tongue and cheek article about being married to a Turkish woman if you would like to read. Don't take it too seriously