WiFi & USBs on Northern?! Don't make me laugh... virtually every 150 & 158 refurb I've had has not had WiFi or USBs despite their social media claiming otherwise, the only 150 I've had with WiFi only had it as somebody forgot to remove it when it transferred up from Great Western Railway
EDIT: can confirm 156451 has WiFi & USBs plus seat re-trim
Northern (Arriva Rail North)