Indeed, not a good time to be looking!
Generally electrician work is regulated to some extent in most countries, and they all have specific regulations that have to be understood and used when doing any work. Having a degree in electronics is a great start as you should know the basic principles, but there are a lot of specific requirements for this job.
In the UK most low voltage (as in below 1kV) work comes under the IET publication "Requirements for Electrical Installations" BS 7671:2018 (now in its 18th version, coincidentally published 2018), generally known as the "wiring regulations". As well as this British Standard, the IET also publish a whole set of guidance notes to help explain the key points of the rather dull read that is BS 7671 (but those notes are not essential) .
Unfortunately this lot of books is not cheap, the regs cost ÂŁ95, and the guidance notes, should you buy all 8 of them, comes to the princely sum of ÂŁ265. If you want to be an electrician then at some point you will need your own copy of BS 7671, but for learning enough to demonstrate competence there are much easier and cheaper books aimed at courses such as the NVQ or City & Guilds courses (which I guess you have, as I just noticed you have started the NVQ?).
As you say, at some point you will also need to demonstrate the practical skills for which an apprenticeship is the usual route. You might be able to pass the practical assessment just by studying around your current job, but it is not easy to juggle your time. Others here might have more useful advice than myself.
Sorry I can't think of any better route!