This is The Bank, but it's not at the listed co-ordinates. Well, there is a bank at the listed co-ordinates, but it's a sand bank and not the one you're looking for!
In order to find The Bank, you will need to find one of the robber TBs who was trying to get here. Flip Flop has taken over from Percy the Pilfering Plumber,[ who suffered the loss of an arm, during his raid on The Bank, so is truly a one-armed bandit], was carrying the co-ordinates. So now you need to find Flip Flop! He should be in a local cache somewhere in South Wales. Flip Flop's TB code is: TB40z21.
If you wish to find out more about the original game go to tbbankjob.wordpress.com for details.
Please don't ask me for the co-ordinates, I won't give them to you!
Good Luck!
Robbers that robbed The Bank were :1st : Percy the Pilfering Plumber 2nd: Desperate Dog Tag Dave 3rd: 'Eadcase 'Arry