According to DownDetector, the problems started at around 07:00 GMT, and are affecting customers across the country.
The announcement comes after Sir Keir and Ms Reeves on Tuesday told top City bosses including Lloyds chief executive Charlie Nunn that 'Britain is back and open for business'.
Lloyds Banking Group has said it plans to shut 136 high street bank branches, affecting its Lloyds, Halifax and Bank of Scotland brands.
The closures across its brands will be completed by March next year, as more customers go digital.
UK bank to review more than 1,500 jobs across multiple departments
Bank expected to set out details of lay-offs which include 163 roles in England and Wales as part of branch-sharing move
The road in the heart of the capital tops the list compiled by lender Lloyds, which analysed average prices between 2019 and 2024.