Multiple Faults displayed - Gearbox\Parking Brake\EBD Etc.

Bought a month ago a gorgeous 2013 XF Sportbrake 3L v6.  56,000 Miles.  Full Service history (10 x Main Dealer).  Drives and handles great until a couple weeks ago.

A whole host of errors, including Gearbox, Parking Brake, EBD, traction control among others (too many to recall) plus intermit heavy power steering. Also the speedo dropping to zero and recovers every few seconds.  No noticeable loss of power to accelerator and continues to drive normally apart from above.

Checking through receipts since last service, earlier this year, the only recent work car had prior to me buying it was Battery 2 month previous and Cam belt 1 month before that neither with Jaguar.

I took the car into local Jaguar dealership who ran diagnostic and scanned codes - reported multiple communication faults with multiple fault codes (see attachments).  But were unable at the time to pinpoint specific issue.  2 days after picking up my Jag from the dealership the same host of errors appeared on the dash and speedo.  

Please any help\info would be appreciated.  She's a gorgeous car who has been well looked after and I just want her back to her best.