Guys, a little update. I've got my replacement fog light, looking at the unit, it does say H7 bulb on the bulb holder... So I will be ordering that.
Although, just a little thought to why HB4's & H11's may also be suitable, the HB4 & H11 bulbs come with the bulb holder attached already, therefore if you don't have the holder - these look identical & should still fit the fog light...