RSM UK is a provider of audit, tax, and consulting services to middle-market businesses.

It is the seventh-largest business advisory firm in the United Kingdom and the sixth-largest globally.

[2] The firm offers audit and assurance, risk advisory, outsourcing, tax, consulting, restructuring, transactions, and legal services.

The firm continued to grow through several mergers, including the purchase of the trading subsidiaries of RSM Tenon Group in September 2013.

[3] Following the purchase of RSM Tenon in April 2014, Baker Tilly became a member firm of RSM Global having served notice on Baker Tilly International, the international network to which it previously belonged.