On Monday, 26 September 2016 09:58:17 UTC+1, Andrew May wrote:
Surely it will be automatically ordered by the computerised stock
control system when the current stock level drops below eight :-)

Of course!

So what I need to do is buy three non-existent lengths and then take them back for a refund next week, then I can buy an existent length.

On second thoughts I'll just go to screwfix...

Owain