The paint is now all removed from the roof, the four ventilator covers (which are made from chromed tinplate!)  and around the front and rear destination/route number boxes.  This job was completed late yesterday.  Today was spent fitting the fairing above the door and making a start on reattaching the lower edge of the cant panel/roof sheets above the nearside windows.

View of the roof in bare aluminium looking towards the rear from the front.

Roof ventilator covers.