By Amber Murray Ad agency M&C Saatchi said that cost-saving measures had contributed to a much-improved performance in the first half of the year, adding that it was “excited” about the future. The company told markets this morning that revenue grew by six per cent in the six months to 30 June, with 12.9 per cent growth in the UK and 47.6 per cent growth in the Middle East. The company said profitability improved “significantly ” due to “the global cost efficiency program, local cost actions [and] loss-making business exits.” Operating profit grew by 40 per cent over the period, and like-for-l…