Do you seriously believe that the Russians are interested in invading the British Isles.
The Germans,The French, the Spanish and others have either tried or contemplated invasion but as far as I know the Russians have never aspired to invade Britain.
Any conflicts between Britain and Russia have been geopolitical ,one empire trying to nobble another empire.
On the other hand, both Britain and America have invaded Russia on occasion.
So it's not hard to see the why the Russians might a tad paranoid about their western borders.