Ah the gun, funny about that, it was always wanted by all countries and when they pay for an aircraft the gun is included in that price. After the first production aircraft was being used by the RAF the UK decided they did not want it on a cost basis, i.e. ammunition, servicing, spares etc. so asked for it to be removed. The cost of designing a replacement ballast weight at the delivery stage of the aircraft and some costs through life was prohibitive, or so I was led to believe, although I cannot say with all certainty that the gun is staying on RAF aircraft. For all those who used to harmonise the guns, particularly on the Tornado, should be glad to know it is way easier on Typhoon, all be it the equipment needs a manual handling assessment before it is used.
Sorry thought I would add this link:
http://www.telegraph.co.uk/news/main...03/ntyph03.xml