The project to fit large batteries to unit 006 was temporarily shelved when Stadler said that they could not find a way of keeping them cool without developing a bespoke system. Subsequently Liverpool City Region, who control Merseytravel, found the necessary funding. The last I heard was that the batteries will now be fitted to unit 008. However, that was at least 6 months ago and Covid-19 may well have caused a delay to the experiment. A great deal is hanging on the trial being a success with ambitions to run beyond the current limits of the third rail to Wigan, Preston, Warrington and some way towards Wrexham.