IIRC they were flogged to Syria about 69 - 71. I was a Halton brat at the time and we had them to butcher/practice trade skills then they were removed. I later heard that they went to St Athan for refurb where standard practice was to chalk a star of david on exhaust so that it got burned in prior to leaving.
BEWARE - This could be the ramblings of an old person with insufficient grasp of reality.