I think the survey specifically excluded contractors.
In any case, £300-£400 is not unusual for a good, experienced software development contractor in the UK, but plenty make less. You won't normally see rates much above £400 unless you're looking in London and/or at jobs requiring very specialist skills.
In any case, £300-£400 is not unusual for a good, experienced software development contractor in the UK, but plenty make less. You won't normally see rates much above £400 unless you're looking in London and/or at jobs requiring very specialist skills.