Quick answer
Yes — an RCBO combines an MCB and RCD in one device and protects a single circuit. This is the best solution for problem circuits.
Yes. The device you need is called an RCBO (Residual Current Breaker with Overcurrent protection). It looks like a standard circuit breaker but also has RCD protection built in. This means if that one circuit develops a fault, only that circuit trips — not half your house. This is particularly useful for circuits that cause repeated nuisance tripping, like a washing machine circuit or outdoor sockets. An RCBO must be installed by a qualified electrician as it involves work on your consumer unit.
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