Two GR4 Tornados low level in the Mach Loop sonicbenj May 30, 2013 Low level / Mach Loop Two passes from GR4 Tornados through the Bwlch Y Groes pass in the Mach Loop. This footage was shot from Bwlch Spur. Related Tags: GR4 Continue Reading Previous PostFive low level Tornado passes from Bwlch middle – Mach LoopNext PostRAF Waddington 2013 – Tornado and Lancaster flyby You Might Also Like Low level Lockheed C130J in the Mach Loop May 31, 2013 Mach Loop Airbus A400 Atlas debut – January 5th 2017 January 5, 2017 RAF Beechcraft King Air – low level in the Mach Loop December 16, 2014