Stay at home and go to www.factory-beds-direct.co.uk instead.
That mattress you linked to has 532 springs which is pretty dire; half of anything FBD sell which you would call a base level.
The cheapest mattress from there is more than double (£210) what the IKEA mattress costs?
The cheapest mattress from there is more than double (£210) what the IKEA mattress costs?
The cheapest mattress from there is more than double (£210) what the IKEA mattress costs?
Yup, worth every penny and still not a lot if you plan on keeping it for 15-20 years. No doubt you'll end up buying more than two IKEA mattresses in that time.
Which is moot since you should change your mattress every ~8 years anyway