Alan your st is facelift isn't it? The only easy way to change bulbs on a facelift is to take the headlight out completely so you can just change everything in one hit. It's almost impossible to change the bulbs while they're still on the car
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Colorado Red 07 Plate ST

Mountune CAIS - 60mm Throttle Body - Full Resonated Milltek System - Bilstein B12's - 300mm front discs - Gloss Black Team Dynamics Pro Race 3's - Tints - Red-Black DMB Badges and loads of eBay stuff...