Travelled on 2 refurbished Northern 158's today and am disappointed that they are inconsistent.
The first was 1587?? (possibly 82 or 92 but I was running late so did not catch the full number). It was working the 08:54 from Morpeth if that helps anyone identify it. This has a more basic refurb than 158849.
158849 has USB charging, new tables and electronic seat reservation indicators whereas 1587?? does not have these features. Why has this unit had a more basic refurb than 158849? In my opinion they should all get some form of USB power so am disappointed that this is not happening.
The upgrades are being done in stages - as I'm sure you can imagine, the PRM mods are the most important so they're ploughing through those as soon as possible. Toilets and PIS are essential.
After those, they'll be doing the 'non-essential' upgrades like WiFi and USB/3-pin sockets. Eventually all Northern 158s will look the same, with the high-back seats, and I believe some will have reservation screens too.