The party’s business development team has communicated that public affairs professionals will not be invited in their own right this year.
It has raised eyebrows by inviting them to exhibit at the event, which is otherwise free to attend, at a cost of £1,200 plus VAT.
The move, which was made before the recent publication of two lobbying sting operations by The Telegraph/Panorama and The Sunday Times, is understood to have been due to feedback that there were ‘too many lobbyists’ at recent events.
However, a source stressed lobbyists on party committees and taskforces would be extended invitations to the event, which shadow business secretary Chuka Umunna is expected to appear at.
A Labour Party spokesperson said: 'The Labour Party is delighted to welcome a range of small and large businesses from across the country to its Annual Business Reception.
'This event is an opportunity to engage and build relationships with the business community as Labour continues to develop policies for small and large businesses.'