Tom’s start date will be confirmed soon following his resignation as Lewisham borough councillor and London assembly member.

Throughout his career, Tom has focused on the rights of tenants in the private rented sector, increasing the building of council homes and advocating for resident ballots on estate regeneration schemes.

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The mayor of London said: “As chair of the assembly housing committee, Tom has become a leading voice in housing policy across the UK, and has rightly earned his reputation as a relentless campaigner for the rights of council tenants and those renting in the private rented sector.”

Tom commented: "The housing and homelessness crisis is one of the biggest challenges facing our city.

“Our goal should be a city where everyone has access to a decent home that they can afford.

“I will work together with London's councils, housing associations, homelessness charities and housing campaigners towards achieving that goal."