Hello and welcome to justanswer.
The next item to check is the brake light switch and this will be located on the brake pedal bracket under the dash. These are quite common to fail and are fairly straight forward to replace as they just twist to remove.
I hope this helps and if I can help further please feel free to ask.
Thanks for the info. Sorry to say i have replaced the Brake light switch and my Brake lights still don't work.
Kind regards Darren.
The next thing to check if you are able to is the live 12V feed to the switch. You should 12 volts on one wire and the other wire should go to earth. let me know how you get on with this and if you need further help.