Oranges & Lemons...

I have been coveting some orange and lemon bushes in our local garden centre but was wondering what are the best varieties to grow heer (we are in Wharfedale)? We could perhaps squeeze a couple of plants into the conservatory over winter to protect them.
Does anyone have experience of them and how productive have they been?

 

I bought one from wilkos last year for £2.50, tiny plany but is now 1.5 ft tall by 1ft. can't remember what type but it goes out in the summer but I keep it inside in winter and spring, no flwers yet.

 

I haven't try planting oranges on my garden because they are a bit hard to grow.It needs a perfect weather,soil and other more things to consider to be able to have a successful planting.