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 Cad West time-lapse from the Mach Loop January 5, 2017 Low level F-15Es, Mach Loop 16th Feb 2016 February 17, 2016 Low level RAF Tornado GR4 Mach Loop May 22, 2012