First, be sure on what you want the bandsaw for and make sure that this size of bandsaw is adequate for now and in the future. Manufacturers tend to overstate their capabilities so get something that can do more than you need.
If possible go and visit a shop and ask to be able to change the blade, don’t let the assistant do it but get them to guide you. Adjust the guides and height and see how easy it is, setting blade tension etc. Change the cutting height, does it stay true and square. Ideally take a piece of wood with you and see how well it cuts. Axminster will let you do this and my local Record dealer is also happy to help as well.
If you go the record route try and buy from a local dealer, that way you deal with them with Record Power as a backup if anything goes wrong. Axminster have fewer stores but their mail order customer service is excellent.
When I was looking at this size I though the 1950B had the edge over the BS250 but now realise that neither was actually up to what I needed. Bandsaws are very flexible and I quickly found I was using it a lot more than I thought, particularly resawing. I note that the 1950 is now £320 and the bs250 is £260 at one of their dealer shows, £60 buys several tuff saw blades!
Richard