Congratulations LowFlyer!
(Don't fly too low thought, there are hazards down there!) In the mean time, relative to your specific question, I have no idea, as I'm not a UK based pilot. But, that leads to another answer for you:
Sure, ask here, and get lots of wisdom. But also, if in doubt while you're flying, it's okay to ask ATC in advance, if they're not too busy. Though I have not flown much in the UK, I have flown all over North America, and from Scandinavia to the Mediterranean. There are differences in airspace and local practice, and even things you know will change over time. Yes, do your flight planning, and gather as much information as you're able before you depart, but if you need to, as ATC, they're there to help! Just ask in time that if you shouldn't enter the airspace, you haven't yet!