Power cuts have caused disruption for shoppers and businesses in Aylesbury town centre today.
Pamela Carter, the manager of NatWest, said: “The bank has been closed all morning.
“We’ve sent a couple of staff to Bedgrove and we are giving some of our customers the money for a taxi to take them there and back if their business is urgent.
“Something like this is such a big thing, it has such an impact on people.
“We were told it would be resolved by noon.”
The power cut, which put tills and cash machines out of action, is the second within three weeks.
NatWest staff stood outside the Market Square branch throughout the morning to explain the situation to customers and if they wanted to deposit cash, staff handed out quick deposit envelopes which were then placed in the bank safe.
Barclays Bank and the Halifax were also affected, with tills and cash machines not working.
But Lloyds and HSBC, at the top end of Market Square were unaffected.
Ms Carter said: “Lloyds offered to help our customers, they’ve been very kind,”
At least 12 men from UK Power Networks were working on the problem with a cable at the entrance to Hale Leys.
NatWest customer advisor Jasmine Pashley said the bank alarms went off at 7am due to the fault, and a similar problem had occurred three weeks ago on a Saturday morning.
A statement from UK Power Networks said: “UK Power Networks engineers are working quickly and safely to restore electricity supplies to three properties in Market Square, Aylesbury, following a fault on an underground cable this morning (Tuesday).
“Staff are on site to try and locate the complex fault, which also caused four properties in Market Square to lose power last month.”
“We understand how difficult it can be to be without power and apologise for any inconvenience caused.”