507003 and 007 have been switched around at Southport with 007 now at the 'Port end. The two arrived in platform 1, were split, then ran in turn into platform 2 where they were re-coupled. Clearly some sort of testing was taking place with this set, with bells being rung at various points instructing the driver to shut off power or brake.
In fact, it took so long to rearrange these units, the 15.12 is now 'semi-fast' to Sandhills. Two fast runs in one day - fantastic!
Still unmoved at Southport is 507011, whilst 507016 and 017 are in platform 3 to form the 15.27 as mentioned.
Edit: A 507 has appeared on the Wirral Line: 507010 on the 17.38 New Brighton - Liverpool - New Brighton circuit. This set should be out into the night on late duties.