Bedroom carpet (RG20 Wash Common)

I am planning to lift a bedroom carpet this weekend and replace the flooring.
It is dark red, lightly used - its in a spare room - 4m by 4.2m, so a good size.
Obviously it will be a big thing to take to the dump, but if someone wants to re-use it, e.g. landlords, it will help me too.
Underlay will also be available but I haven't seen its condition yet.