The OP is using it on a turbo, don't think the weight of the wheels really matters
@Stoves
Just to clarify for everyones sake - Do you eventually plan to take the bike out on the road? Because If the bike is never going to leave the house then you dont even need half the amount youre specifying. (and everyone making suggestions that fit your budget are wasting their time)
My suggestions are based on the assumption on the budget of £450 that maybe you might want to take the bike outdoors for rides when the warmer weather finally gets here.
If thats not the case then any £80 bike from Tesco or Argos will easily do. Its cheap, it will fit on the turbo and you can ride it but you might not enjoy it as much if you ever decide to take it outdoors.
Id hate to be wasteful and spend £80 for a bike that will never leave the house only to want it to leave the house when the sun comes out then spend another £450.
At £450 at least you have something half decent for longer rides.
I know for a fact that I will literally be riding until the sun goes down when the summer comes. Thought maybe you might like to do the same.