The business, which includes all above-the-line advertising for RBS's high-street banks, moved back to M&C Saatchi without a pitch. It will now handle all the creative, including TV and press, on the account.
The agency already works on the RBS-owned NatWest and Direct Line.
The move is part of a roster rejig that saw CHI & Partners pick up the direct marketing for all of RBS's business in March. CHI is running the account as a joint venture alongside Tag, the design and production agency, out of a specially launched office in Shoreditch called The Box.