LM Class 319 on Tring services

[Class455]

Hi guys,
Hoping to travel on a London Midland Class 319 when I go on the WCML (either Harrow and Wealdstone or Watford Junction) to spot a Thameslink Class 319 storage move next week. I was wondering which London Euston to Tring diagrams are worked by a Class 319?

Also, while I'm at it, is a Class 319 booked for the following Euston to Tring services?

2T39 10:34 London Euston to Tring
2T35 10:04 London Euston to Tring

Thanks in advance!

 

[matt]

See here http://www.railforums.co.uk/showpost.php?p=1478562&postcount=11