Question regarding colleges in UK

Hello guys, I recently moved from Croatia to the UK, finished secondary school, and am ready for college. In the UK, they only accept 16-year-olds to enter colleges, and I was wondering if anyone knew if there was an electronic or any other type of technical school for 14-year-olds in the surroundings of London.

I’m just asking in case someone knows and if you do please say so!

Thank you for your attention