Quote:
"Many actors spend less than half of the year in acting jobs, so you will need to be prepared to find additional work to support yourself between successful auditions. Temporary jobs in shops and offices, supply teaching or casual work in hospitality and catering are all example".
Source:
https://ccskills.org.uk/careers/advice/article/actor
If you're going into acting, you'll almost certainly need a secondary career path to fall back on. Photography could offer plenty of opportunities (such as commissions for advertising work or wedding photography) for finding some additional income. So it might make sense to seek some qualifications in Photography.
Perhaps you should investigate the possibility of studying for an 'acting-related' degree (such as in Theatre Studies) offered on a joint honours basis with Photography? For example you can take Film and Television Studies jointly with Photography at Derby Uni.