He's left the championship.
Not sure of the exact reasons, so don't take this as gospal, but his sponsors pulled the plug, but also had something to do with accusations about unfair advantages at the Brands Hatch season opener, involving alledged tyre compounds discrepencies, by Ferrier and his sponsors against SEAT Sport.
It had a piece in Autosport about it, i've not got it to hand at the moment, but basically they have supposed to have taken legal action, yet SEAT Sport say they had not received any legal contact.
Also the fact his season had gone pear shaped in terms of contesting for an outright championship win, they decided to call it a day.
Thats as much as i know, most of which i read in Autosport.