I don't think Ickle Bubba are that great honestly. Cheap parts, and not priced to match.
In that kind of price range I would look at Maxi Cosi, Joie, Nuna, Silver Cross, and Cybex Balios S Lux is great. Cosatto - I think their prams are good? Their all-stage car seats are not great it seems.
Beware of tiny wheels, unless you are looking at a microfold like the Babyzen.
Joie in particular tend to do cheap really well. They know where it matters to spend and they don't skimp on those parts. So you get a product which has a lot of the quality and features of higher end models, but may miss some extra functions or touches, like it might have a simple design and they might use cheaper fabrics, which are less important than for example the hinges and clips. What you find sometimes on the more fashion oriented brands is that they have premium fabrics and pretty designs, but cheap moving parts which don't last. Also, Joie prams tend to come with a raincover and car seat adapter which is probably £60+ you'll save compared to models where they aren't included.
Check StrollerWorkshop on youtube for reviews as well. They are really helpful although they don't have every model on there.
Beware of bundles - they only save you money if you were going to get all of those exact extras anyway. Sometimes you can get a good deal if for example there is a very high end car seat you want. But a lot of the time, you'll save money by getting car seat and buggy separately then just buying a universal changing bag/footmuff/etc. And don't bother with a parasol. They never face the right way and you will curse the stupid thing then give up.
Raincover and footmuff - these are worth getting the official one if they have special attachments to zip/clip on. If not, get a universal one.
Most pushchairs these days can take a universal or multi-brand adapter which will take a Maxi Cosi, Cybex, Britax, Besafe, Joie or Nuna car seat.