XC 170s in the South?

[Dudds]

Greetings. Can anyone let me know how I find out where, if I live near Portsmouth, is the closest place I can go to see a XC 170? (It's a request from my six year old.) Thank you.

 

[Nym]

Geographically, either Gloucester or Chepstow, or by rail, Newport.

 

[northwichcat]

A Southern 171 is the same train but with a different livery and a different type of coupler.