Battery Loco's

I was just wondering, it maybe a long shot but as the Hainault loop, is shut for the next week or so I guess it will be busy with engineering trains, do you have any details of the paths for the trains between Newbury park and Hainault via Woodford. (I am told that's what they are doing) and the paths back to Ruislip at the weekends.

Sorry for the question, I just really want to get some photos of battery loco's on the central line.

Thanks