How usual/unusual is this nowadays?
Im not certain pf the frequency of these “close encounters”
Depends. Does the UK have an “oppressed Russian minority?”
Source: http://en.wikipedia.org/wiki/File:RAF_Tyhoon_Russian_Intercept.jpg
UK figures for recent years intercepts.
Parliament - Written Answers to Questions 24th January 2013
Thursday 24 January 2013 Angus Robertson (Moray, Scottish National Party
To ask the Secretary of State for Defence on how many occasions Royal Air Force aircraft have been launched to monitor Russian aircraft approaching UK airspace in each of the last three years; and where each such flight was (a) directed and (b) scrambled from.
Andrew Robathan (South Leicestershire, Conservative)
Royal Air Force quick reaction alert (QRA) aircraft are based at RAF Leuchars and RAF Coningsby. The number of days on which QRA aircraft have launched in response to Russian military aviation that approached or entered the NATO air policing area for which the UK has responsibility in the each of the last three years is contained in the following table. The Russian aircraft remained in international airspace at all times. Not every launch resulted in an interception as some incidents were resolved prior to interception.
Number of days QRA launched in response to Russian military aviation
2010 11
2011 10
2012 8