The official answer is £50 fixed penalty and no points. Technically it affects your ORCS too, but by looks of things only for 28 days. Of course if you’re driving along a motorway and it went bang, maybe they’d let you replace it within a certain time as they can obviously blow anytime - might depend on the attitude test.
assets.publishing.service.gov.u … policy.pdf
The code is: “IM 63C” on page 37 of the PDF.
As for changing bulbs - on DAF CF’s upto and including 13 plate it was dead easy and took 5 minutes. On our 15+ plates it’s a right nightmare involving either very slim hands that know what they’re doing, or lifting the cab and more fiddling. That might well go to the garage until DAF get the message and actually make them sensibly again.