Raindog is using the investment to expand beyond its roots in film into making TV drama, music content and documentaries.
Last year, a record £3.6bn was spent by film studios, TV companies and streaming services in the UK, making 188 films and 123 high-end TV programmes, such as The Crown and His Dark Materials.
The fund benefits from the government’s Enterprise Investment Scheme, which encourages tax breaks of up to 30% to encourage investment in higher-risk companies.
Firth, who cofounded Raindog with former Sony Music UK chief Ged Doherty eight years ago, has taken on the investment from the UK Creative Content Fund.