I don't think I'll bother to go down the route of attempting to use my Avometer, why I can barely use the digital example and then only in one position. A similar analogy would be a person attempting to re-pivot a balance staff on a wristwatch without even knowing how to open the case back. Incidentally, I acquired the meter upon a friend's demise over 20 yrs. ago and never even looked at it until now.
Although a relatively simple task for a person with basic radio technology knowledge, I think that rewiring my fan is going to be a bridge too far for me. If anyone resides in the Woodford area of London, maybe I could pay them to locate which wires go where.
I did remove the armature for the purposes of photographing the windings and there aren't any brushes. In fact, I dismantled the entire fan in order to check the mechanical parts etc.
I enclose a primitive diagram of how I think the wiring might be and you will note that there are more question marks than at best, 'guesstimations