Some good info there from Martin.
433.150MHz is indeed in the Radio Amateur 70cm band and must've been given specifically to you, (or found out by you?), as it's a frequency for the repeater GB3CR which is in your neck of the woods. I presume you can hear local Ham chat on that frequency?
There are a few repeaters your way and typically a lot have converted to digital modes DMR/AllStar etc. meaning you won't be able to pick anything up from them on your Baofeng. If they have FM then you can listen to them.
Some other frequencies you could try are :-
430.86250 MHz - GB3PT repeater
433.25000 MHz - GB3LI repeater
433.17500 MHz - GB7SJ repeater
430.87500 MHz - GB7HN repeater
430.91250 MHz - GB3EG repeater
Those are 70cm repeaters and should be within listening range of you.
145.68750 MHz - GB3SJ repeater - Hopefully that still has FM as it has AllStar modes mentioned.
145.63750 MHz - GB3VO repeater
These are the nearest 2m repeaters to you.
Type in any of those frequencies, wait a while and you should hear something even if just the repeater ident which is usually a Morse message, (of the repeaters name), or sometimes an automated spoken ident.
That will at least get you listening but as pointed out you'll need a Radio Amateur licence to actually speak on them, (and why I've given you the listening frequencies not the transmit
As Martin also pointed out you can also program the Baofeng for PMR frequencies. There's usually not a lot to be heard on them, maybe children playing on walkie-talkies, (same frequencies), and usually local businesses. You'll soon get bored of hearing "Sharon, can you come to the shop floor please" in that awful nasal way. Sometimes you'll hear local 'security' and that'll be typically "Dave! Dave! You copy?", swiftly followed by, "You coming for a smoke?"
Unless you have a mate also with a PMR radio it's a bit booooring....Even with a mate you'll find out you can't transmit far and realise you're both just playing walkie-talkie
You could play with antenna building, it can be a lot of fun, but a 1/4 wave GP isn't likely to give you much more listening range than the rubber duck that comes with them. Little tip, it's VHF/UHF so you'll probably hear more outside of the house than you will inside but you could always hang out of the window and see how that fares. Get to the top of a local car park or some such and you'll have clear open air high views and hear much further.
Anyway, hope some of my waffle helps you in any way.
All the best,