Privet Natasha,
I gather that you are Russian Natasha, so my wife who is also Russian welcomes you to the U.K.
There are many Russian channels available on Hotbird and Sirius most free to air. You already have some off of Hotbird, but as for Sirius if you have Thor at 1 West, Sirius is right next door at 5 East and you should be able to receive it.
Try the fta Ukrainian channels at 11.766 H, 27500, 3/4, there six channels like Novy Kanel, Enter Film, and TRK Ukraina.
Also on Sirius is ICTV at 12.633 V, 3720, 3/4, if you can get Astra and anything west you should be able to pick these up.
The NSAB package at 12.380 H, 27500, 3/4, has Moscow Free World fta, but the rest like NTV, and ORT , you will need to buy a card I'm afraid. At the moment ORT is fta on Hotbird, so the only one you would be paying for is NTV.
If you did want NTV you might be better off trying the NTV package on Hotbird where there are three NTV channels as well as two other Russian channels.
Best of luck, and hope that you enjoy your stay in the U.K.