By Katie Weston For Mailonline
Published: 08:32 BST, 15 August 2020 | Updated: 08:34 BST, 15 August 2020
A builder sparked a security alert by leaving top secret designs for Parliament at a Greggs in Westminster Tube station.
A member of staff at the bakery chain is thought to have picked up the plans and skimmed over them, before deciding to give them to the police.
The documents have since been passed along to workers at Westminster, who are investigating the security breach.
The Palace of Westminster is undergoing a restoration and renewal, after Parliament spent over £369million on maintenance work since 2016.
A member of staff at the bakery chain is thought to have picked up the plans and skimmed over them, before deciding to give them to the police (file photo)
Builders were sent to pick up the plans from the bakery on Thursday morning, one day after they were left by the worker, but they had already been given to the police.
A House of Commons spokesperson said: 'Documents were left by a contractor outside of the parliamentary estate but have now been returned.
'The House of Commons takes the matter seriously and is currently investigating this incident.'
A friend of the Greggs worker told The Sun: 'As soon as they realised what it was they handed it in – luckily no member of the public saw what was inside.'
A Met Police spokesperson said: 'On 12 August, a police officer at the Palace of Westminster took receipt of documents found by a member of public.
'These were passed to staff at the Palace of Westminster who are investigating the incident.'