Long 6W Filament Bulb with E27 Fitting | LED Lightbulbs
Screw Cap or Bayonet: Which Lightbulb Should I Buy? - Moonlight Design
Simple energy saving guide - replacing bayonet GLS bulbs
paul russells Bayonet Cap Fittings Light Bulbs B22, 60W Equivalent, Warm White 3000K, 7W 560lm LED Bulb, BC A60 Classic GLS Standard Energy Saving Lightbulbs (Not dimmable), Pack of 2 : Amazon.co.uk:
Lighting Guide - POS-ELECTRICAL.COM
Light Bulbs and Light Fittings | Graham and Green UK
Lightbulb Lamp Base Converter. Use Screw-in E27 Lamps in a B22 Bayonet Light Fitting