Money off train tickets if travelling with a child
Get a free two-month Family & Friends Railcard when you enter the code 2NE4 1REJ via this Railcard Trial link until 3pm on Thu 12 May. You could be on track for some big savings, as it gets you and up to three adults travelling with you 33% off most train fares, as long as there's one to four kids with you, who get 60% off (see below for terms).]
It is for June & July so just right for half term (well, ours is 2 weeks, mostly in June), and the beginning of Summer.
Also a voucher for money off a year card to follow on if you want to.
Beware though, one of the named 2 people has to travel, or they charge extra on top of the full price ticket (I thought there was something about it on the Guardian money page, but can't find it)