The third in our series of live streams will take place on Tuesday 2nd August. Stream 3. We have teamed up with the St Albans Signal Box Preservation Trust to provide a live stream from the southern part of the Midland Main Line. With passenger trains from EMR (East Midlands Railway), Thameslink and freight from Freightliner and GBRf plus possible Network Rail movements we should have a wide range of motive power on screen. Plus we have a fabulous signal box to look around. More details about the box can be found at: St Albans South signal box.