LED headlight upgrades on classic cars: legal or not?

Classic cars built before 1 April 1986 can now have LED and high-intensity discharge bulbs

Are LED Headlights Legal?

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How To Aim And Align Your Headlights

Are LED headlight bulbs for cars legal?

LED headlight upgrades on classic cars: legal or not?

It is illegal to upgrade my headlights to LED?

LED headlight upgrades on classic cars: legal or not?

Are Aftermarket LED Bulbs Road Legal?

LED headlights for cars – function & adjustment

Installing LED Lights in a Classic Car