(Reuters) – M&C Saatchi’s top investor Vin Murria on Friday pulled out of a race to buy the London-listed advertising firm after the company earlier in the day agreed to a takeover offer from consultancy Next Fifteen Communications. AdvancedAdvT, Murria’s acquisition vehicle, said on Friday its offer of 253.6 million pounds ($316.1 million) for M&C from earlier this week was final and would not be increased. Next Fifteen agreed to buy M&C for 310 million pounds. ($1 = 0.8023 pounds) (Reporting by Sinchita Mitra in Bengaluru; Editing by Shounak Dasgupta)