Sounds interesting, the 04 plated B7RLEs at Lothian have always been a firm favorite as, despite the garish blue interior, they have always seemed fairly smooth and quite quick as well. Hopefully they keep them for a few more years yet instead of buying more of those rather meh B8RLEs.
My comments relating to refurbishment (hybrid, re engine or electric) relate to B7TL's. Gemini's, double decks. The B7RLEs are single deckers.
Hydrogen is a great idea, but it's the set up costs that are the issue, you really need to buy a lot of buses to outweigh the cost.
We have 7 depots now including ECB, LB, LMC and LCB. The cost would be astronomical as for fleet movements and day to day last minute change overs, we'd need Hydrogen facilities at every depot
just in case. It's often the case that a Longetone bus will cover a Marine or even a Livingston bus. After this situation occurs the vehicle goes back to the non native garage to be refuelled and cleaned.
Every depot would need hydrogen supply and training for staff, of which is a large cost and would only be outweighed if each depot got hydrogen vehicles. So the initial purchase would need to be vast.
Lothian need that flexibility. But hydrogen just isnt there and as above, isn't available on a Volvo Chassis as yet I dont think.