I like sorta live close to tring and I don’t want to buy two bags of huel, just one. Would huel be able to sell me 1 bag if I drove up to tring to pick it up? Also, so i can take advantage of the referral code, can i buy a £28 bag online, use the £10 code to drop it to £18, and then pick it up? 
Welcome to the forum @notreallyahueligan 
I’m afraid this is our HQ office and not our warehouse that manufactures Huel so you would be unable to come to the office to pick up Huel products.
All orders need to be placed through our website and there is no way of purchasing a single pouch.
I’m sorry to be the one to break your new forum spirit 