Need to withdraw cash for some building work. Went into NatWest to ask how to do this and they said id need to fill out some paperwork and state what the money was to be used for. I said at the time it was to buy a second hand car and was told I’d need to bring photos of the car, and any email correspondence. I had my toddler with me so said I’d pop back another time when I had my hands free. I need to withdraw cash £7k. Is there a way I can do this without having to supply any proof or explanation of what it’s for? It’s my money so I don’t feel I should need to tell the bank and obviously don’t want to name my builder in the process.