If you choose to use Cousins you are not de facto a 'consumer'. Any purchase would be trade to trade (ie you). Lots of TZers have used Cousins without any problems for years. Their straps in particular are excellent quality. There's another thread on this somewhere...
First part of the T&C:
Cousins Material House Limited is a trade wholesaler. By placing an order or request for quotation with Cousins, you are accepting our trade terms and conditions and confirming you are purchasing items for use in your trade. Your existing statutory rights are not affected by these conditions.
https://www.cousinsuk.com/page/termsconditions