I found a post by a Bovis buyer who was completing before Christmas asking for the vouchers.
Bovis told them they already had a better "deal" which also included "free" carpets and turf which was worth more than the vouchers.
It applies to the stick houses that have fallen through after buyers pull out, or certain plots on a development that no one wants to buy!
All buyers would be better asking for £20,000 discounts. Around now, they would get them!