I wonder if Openreach would consider changing ECI cabinets out and putting Hauwei cabinets in. They could 'upgrade' them when they are implementing G.fast.
It's obvious that they need to streamline the network better at some point as we're moving forward.
IMHO the easiest way to proceed would be to swap out the M41's with a V41. They take the same space in the cabinet. They use the same line cards and other equipment. Ive no idea how much ECI would sell a bulk load of V41's to BT at, but it would be comparatively cheap if thats all thats needed. Far cheaper than replacing with Huawei's, no need to buy new line cards, no need to lay new fibre.
A thought just occured - I wonder if the V41's can also fully support G.INP, its not something Ive checked.