It's part of the 4 year financing package and offer at the moment.
I've copied and pasted the info from the Renault UK website below;
"From £199 per month* with £1000 deposit contribution from Renault*Plus £500 equity contribution towards your next Renault Selections Finance vehicle purchase**Plus four year's free servicing***Plus four year's warranty***Plus four year's roadside assistance***"
"The £500 voucher can only be redeemed 6 months after the Renault Selections agreement of the first vehicle commence, can only be used once and will remain live until 6 months after the end of the Renault Selections contract in question. It can be used against the next Renault car order (on retail) made by the same customer or by an immediate family member"