Mr BH was sent on a shopping trip recently by his beloved Mrs BH. Now, as anyone that knows us will tell you, this isn't necessarily the wisest strategy as Mr BH can be, well, a little forgetful...
Have a look at the short video on the related webpage to see what he's been buying. As you might guess from the presence of one of the items on the list*, his judgement was impaired and consequently he's forgotten half of the things he set out for. Can you guess what he was meant to be also buying?
Suggested car parking co-ords are located in the geochecker. Please park considerately, safely and legally.
The cache is one of our custom unique containers. Please don't post spoilers, don't spoil the surprise for future cachers. You will need to bring your own pen.
You can assume N52 and W0.

*the reference to a certain beverage is purely a private joke for the benefit of anyone that knows us, and is added to the fictitious story for comic purposes. It's a red herring as far as this puzzle is concerned.