Hi Hon,
I'm not in the UK but I will make a general comment. Most places are accepting. I'm in Australia and every transgender women and men I know are employed. And in a vanity of fields from check out people to Pathologists, CGI operators, politicians, builders, concrete pourers, night club owners - anything, the trick seems to be, be good at your job, be keen and enthusiastic and take on anything.
Never ever say never. And always push yourself.