Wondering if anyone knew if halfords sell the rear number plate bulbs for the sei?

If so im guessing their pence with a trade card

Should have them in.

sweet thanking u

56p ish a pack of 2

Cinqs use the long festoon type bulbs, not sure about Sei.
But when I took mine out, the plastic where the bulb contacts fit broke away and crumbled to dust.
So I got some std W5W bulb holders and epoxy'd them in place, see pic:

Good mod. The other one that's worth considering are light bolts like WHITE LED SCREW LIGHTS/LIGHT BOLTS FOR CAR EXTERIOR STYLING/NUMBER PLATES: Amazon.co.uk: Car & Motorbike.