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Greetings all - wondering if anyone can help me work out what year this is - 

95% sure its a MV Agusta 4C

First I thought this was the 1954 senior TT 37 was Fergus Anderson so he would be talking to Bob McIntyre.
But from the Programme 37 is a Guzzi...but this is a MV 4C  so cant be 1954! 

Could be Dickie Dale who was riding for MV (running under Number 33 in 54)    

However Velocette did use the same forks on a special as I think MV did so I may even be wrong about it being a MV! 

It looks to me like one of the Ernie Earles BSA twin powered machines. Maybe ridden by Cecil Sandford or Charlie Salt in the 1952 or '53 Senior TT.

I would say that it's Charlie Salt on an Earles fork BSA A7 twin.
I'll get the year with a bit of research.

Earles forks on a BSA makes more sense (good I kept the 5% of doubt!!)

Other images show a AJS porcupine and a couple of Moto Guzzi...

In the Senior the only race I can find with 2 Guzzi is 1954
Which was made number 27 Sandyl-Winsch with Earles forks ... on a Velocette but this isn't a Velocette!

Curious