Win the Lottery for free
There is only one way I know to win the Lottery for free that I know of since there is no free trial. You have to fund your ticket purchases in some way. So you either become a paid affiliate for the UK National Lottery and recycle what they pay you on ticket purchases or you regard some kind of business income as solely for the purchase of Lottery tickets.
The ideal way, I think is to become an affiliate of eLottery since their program offers an automatic way to fund your entry into the Lottery draw by affiliate commissions.
The way it works is that for every new player you introduce to the eLottery syndicate, you get 20% commission so finding 5 players as an affiliate/player, you effectively enter the Lottery draws for free.
So with this system, you are in with a chance of winning the Lottery and doing so for free.