The trial took place on Thursday evening with 7A91 22:50 Merehead - Acton.
70003 was selected and was run to and prepared at Southampton Maritime, then 0V70 light engine to Merehead in the midday period Thursday, seen here passing Romsey. There as then a Merehead - Westbury and return familiarisation run.
70003 returned to Maritime as 04:28 Acton - Southampton, and arrived over two hours early at Maritime at 04:55. It is due back on intermodal duties later in the day 19th July.
Flickr for 70003 this week - nothing visible from the trial, similarly on YouTube.