There is a fast ferry which runs from Stavanger to Bergen which is a good experience but also might make flying in from the UK a bit easier as Stavanger is a larger city.
Not quite true. Bergen is by far the bigger city in reality. Second biggest in Norway I think. But Stavanger is where all the oil money is, so usually more direct flights into there.
Also, it was expensive before Brexit. It's a very rich, socialist country. They do have some rather good benefits there. But also incredibly high taxation.
I work in Norway mostly. So usually fly in and out of Bergen a couple times a month. Occasionally also, or through, Stavanger.
Expect a Beer to cost somewhere around £10 a pint. They have started doing 0.75L beers now, which are about £13. A chocolate bar would usually be in the region of £2, and a bottle of coke (500ml) somewhere around £2.50 - £3. Luckily you can hit the duty free after you land if you forget before you fly, so you can pick up duty free then. Before Brexit it was worth doing it that way, post-Brexit though, you are generally better off grabbing it in the UK. Although you can get beers from the duty free when you land, so if you're not into spirits, thats a good shout. Remember it aint in the EU though, so there are limits on what you can buy / bring in.
Expect a "nice" meal to come in around £50 a head if you want a beer with it. That'll go up if you're fancying starters or desserts though, and they will run around a tenner a pop. Even a burger from a night-time burger place, with chips and a drink stands near £20. There is a really nice "hot-dog stand" just near the bottom of the Funicular in Bergen which is in the guide books. It's a nice, relatively cheap feed there. Definitely give it a try. Plenty of Pizza joints around too, and they are generally about as cheap as it gets for eating out.
Flying into Bergen is lovely, its a very rocky, coastal city. And you come in over all these little scraps of rocks with houses clinging onto them. You can imagine they would be wild places to live in a decent storm. The city is really spread out to. Stavanger, on the other hand, has a lot of green fields and stuff. It really does feel like a completely different place.
If you do fly into Bergen, or really anywhere, try to avoid taxis. They are £15-20 before you even start. It's around £60-70 for a taxi into town from Bergen airport. Or around £15-£20 return for a bus. The tram should hopefully be finished soon, so that might be a nice change. I believe it isn't quite run up to the airport yet though.
In town there are lots of nice restaurants and bars though. The people are really friendly too. It is a nice place to go out in the evening, but it does rain often, so make sure you have a good jacket.
There are LOADS of TESLAS there. Mostly because they don't tax them the same, so a P90 costs about the same as a 5 series, then you don't pay for fuel, and you can use the bus lanes and stuff. So electric cars are everywhere. So watch out when walking about.