To get your free bet of up to £50 here's what you need to do.
Open an account, place your first bet of £5 or more and Betfred will give you a free bet to the same value, up to a maximum of £50.
See site for full terms and conditions
"4. The cumulative odds of the selections on your first bet must be Evens (2.0) or greater. If the odds of the selections on your first bet are less than Evens (2.0), you will not be eligible for a free bet.
5. Your free bet will usually be available in your account within 48 hours of your bet being settled."