To be honest, this shocking setup should (and hopefully) would shame any Halfords store manager, I can't believe this sort of shoddy work is widespread across Halfords, they do have a structured training progression system in place.
However, the individual who built the bike should be ashamed or him/herself if he/she looked at the forks and then handed it over to the customer, he/she cannot cannot claim to have any bike building skills and should be resigned to the checkouts.
I would definitely make sure the store knows about this so they can take action, before he/she builds the next bike or a customer is hurt as a result of their dangerous bike building