The London-based company, founded by Matthew Freud, has been appointed to organise public relations for the ticketing, volunteering and torch relay campaigns, PRWeek reported today.

 They represent three of the most high-profile campaigns that are due to take place between now and the opening of the Games.

Freud had earlier worked for London 2012 when they did the PR for the Handover Ceremony party in the capital at the end of the 2008 Beijing Olympics.

Hill & Knowlton and Edelman, the other agencies that took part in the final round of a four-month long pitch process, will also join the roster to handle specific projects, it has been reported.

Mandate Communications is also expected  to take a spot on the PR team, to continue its oversight of London 2012's public affairs, which it has handled since the beginning of 2009.

The concept of having a PR roster rather than having one dedicated company is a change to what was originally planned when the process began last September with six agencies selected to tender for the business at the end of last year.

The original brief covered a wide range of activities, including PR for event, licensing, ticketing, mascot and education programmes.

Public affairs and political monitoring was also included.

A spokeswoman for London 2012 told insidethegames: "We have appointed Freud to help with a few of the key campaigns and the procurement process to secure all our 'roster' agencies in ongoing - we will end up with a number of agencies handling different parts of our very wide brief."

Freud pitched for the business in conjunction with sister Publicis Groupe agency MS&L Group, as well as Pitch PR.

They are one of the most high-profile PR companies in Britain and their previous clients have included Nike, AOL, the Anschutz Entertainment Group and Walkers Crisps.

Other agencies that took part in the first round of the pitch included Weber Shandwick and Bell Pottinger.