The first island platform comprises platforms 5 to 8. Platform 5 is inside the main train shed while 6 is a southerly extension and 7 and 8 were added outside the supporting wall in the 1930s. Platform 5 is used by trains towards Cardiff and platform 7 to Portsmouth; platforms 6 and 8 are the main platforms for Weston-super-Mare and stations to Penzance. Between platforms 5 and 7 are the two spur sidings that are long enough to stable a single Class 153 DMU.