Rumours of M&A activity boosted shares in The Restaurant Group (TRG) yesterday. It ended the day 4p higher at 247.5p off the back of speculation of private equity interest. Mitchells & Butlers (M&B), the managed pub group, that sold £372m worth of pubs last week is also believedto be circling the owners of Garfunkel’s and Frankie & Benny’s.