Ulf Jørgensen wrote:
I believe the Tornado GR.1 have two 27mm Mauser cannons. One of them have
been removed in during the GR.4 upgrade, in favour of a FLIR(Forward Looking
Infra Red).

Look he http://www.airpictorial.com/pages/tornado_gr4.html

But that's a GR.4A recce variant.

Philip Morten