Probably this I was thinking of...
'Early 1984 F.W. Evans ATB/Saracen ATB? (Manufactured by Bluemels).
In 1982/3, Richard Ballantine asked London bike shop F.W. Evans Cycles to build up two Ritchey frames he had brought from the U.S. for Tim Gartside's and Peter Murphy's ,February 1983, Saharan expedition. Evans were curios and persuaded Bluemels to build some bikes based on what they had seen. The resulting FW Evans ATBs were mostly silver and branded under the shops own marque. The Bluemels’ own Saracens bikes were identical, apart from being painted black.'