This is probably a silly question, but I'm completing on my first ever property next week, and one of the items on my long list of things I've never had to do before is change the locks when I move in, and I'm not sure exactly how to go about this. From browsing previous threads, it sounds as if the only thing that needs doing is replacing the barrel of the lock, i.e. the bit the key fits into. Is this correct? Is this something I can easily do myself, or would I be wise to pay a locksmith to do it? And how much should I be expecting to pay (in north London)? Recommendations for good (sensibly priced...) tradespeople welcome!
I've attached a photo of the lock, in case that makes a difference.