Don't go if you don't want to/you're not sure. I deferred my place and then went to uni because I wanted to leave home and move to London and i wasn't sure what else to do - the course itself (Social Anthropology) was barely on my mind. I struggled to engage with the course and so struggled to complete all the reading (which was a big deal at my uni) so I wasn't doing very well which took a huge toll on my self-esteem. I quit on the day of my first exam after Easter, having got so depressed that I hadn't left my room for about 2 weeks. This is not to scare you, but it's just to say you should be sure that you want it. I ended up with £11,000 of debt and a course of counselling.
A year later, having worked as a teaching assistant, I'm now going to do a Primary Teaching degree. I'd worked as a TA on my gap year and missed working with kids while I was at uni (my halls were right next to a primary school which kept it in my mind hah!). And there is a huge difference about how I feel now. Yes I want to go because I want to move to Brighton and meet interesting people, and yes I'm excited to put stuff up in my little halls room and find some nice societies to join. But I'm also really quite genuinely excited to learn about child development and how to improve as a teacher and what the best ways are to teach children with special needs. YOU know if you really want this or not. And it's not the be-all and end-all if you don't go this year. If you are really interested, you'll come back to it.
The other thing is flip a coin, heads to go, tails to defer. Are you hoping one way or the other? Are you disappointed when it says you should take a year?
Good luck with your choice, I hope you make the best one for you!