My Family actor Gabriel Thomson was cautioned today by police

My Family actor Gabriel Thomson was cautioned by police today for possession of a class A drug.

The 21-year-old star of the BBC1 comedy was arrested yesterday by officers attending reports of a disturbance at a house in Battersea, south London.

It is believed that both cannabis and cocaine were found at the address.

Reports suggested police were initially called by a woman staying at the house who complained that money had gone missing from her handbag.

A spokesman for Scotland Yard said today: "A 21-year-old man was arrested just after 3.30pm yesterday afternoon after reports of a disturbance in Battersea.

"The 21-year-old was arrested over suspicion of possession of class A drugs. He was taken to a south London police station where he received a caution under advice from the Crown Prosecution Service for possession of a class A drug."

Thomson was spotted prior to the arrest acting drunk and disorderly in the capital's West End area and appears to have a reputation for hard-partying.

This in stark contrast to his TV role as geeky son Michael Harper in the long-running BBC sitcom starring Robert Lindsay and Zoe Wanamaker.

He started his career in acting at the age of four, appearing in a breakfast cereal commercial.

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Gabriel outside a club hours before his arrest

The Hammersmith-born actor has also starred in the Jude Law film Enemy at the Gates and in a BBC production of Great Expectations.

He was rumoured to be playing Harry Potter before Daniel Radcliffe was announced in the role.

A spokeswoman for the makers of My Family declined to comment.

Sitcom: Gabriel in My Family (centre) with co-stars Robert Lindsay (right) and Ellie Bevan (left)