here is how to watch the Blackpool match if you are not a current iFollow subscriber.
I've just been through the process to test it works.
go to https://www.mansfieldtown.net/ifollow/
choose free pass
set up your account
log in using your new account details
go to the match centre on the mansfieldtown.net homepage
choose match pass
pay your £5 using either paypal or entering credit card details
return to the match centre before kick off to watch the game
If you are already an iFollow subscriber, just go to the match centre before kick off