The report is based upon a letter from the Latvian Foreign Ministry to the British Foreign Office regulator to which Sky News was granted access.
The company responsible for the broadcasts, Baltic Media Alliance, can broadcast its portfolio of channels throughout the European Union as it holds a British broadcast license.
However, that situation is likely to change when the UK exits the European Union in 101 days' time as UK broadcast licenses will no longer be valid across the EU.
The British broadcast regulator, Ofcom, said it is investigating the claims.
The story is available via the link below.
EXCLUSIVE: Latvia has raised concerns with Britain over what one diplomat described as "hardcore propaganda" against the UK and its allies aired by two Russian-language television channels that are registered in London.https://t.co/ZsN4By0h9H— Deborah Haynes (@haynesdeborah) December 16, 2018
Back in 2012 the investigative journalism outfit Re:Baltica drew an outline of some of Baltic Media Alliance's holdings.