https://www.ebay.co.uk/itm/Light-Strangler-Seatpost-Clamp-Lightweight-Screw-On-31-8mm-Glossy-Black-BSP-85/132368931921?
£10 posted here.
£8.50 on amazon, so went with that
@Scrabble started
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https://www.ebay.co.uk/itm/Light-Strangler-Seatpost-Clamp-Lightweight-Screw-On-31-8mm-Glossy-Black-BSP-85/132368931921?
£10 posted here.