There seems to be very few people who actually have their bike kitted out with pedal reflectors etc.
Enforcement of rules applying to bicycles seems to be almost non-existent these days judging by the number of people you'll see riding them in the dark with no lights!
There are a lot of things in the current regulations which are extremely petty and highly unlikely to be enforced in real life. For example, the
The Road Vehicles Lighting Regulations 1989, section 14 states:
(2) Where any pedal cycle manufactured on or after 1st October 1990 is equipped with any lamp that is required by any Schedule to these Regulations to be marked with a British Standard mark, no filament lamp other than a filament lamp marked with the marking indicated in the British Standard specification for Filament Lamps for Cycles published by the British Standards Institution under the reference 6873: 1988 namely "B.S. 6873" shall be fitted to any such lamp.
The first part of this section makes a similar restriction about bulbs fitted to lamps on cars made after 1986, which strictly speaking means that most of the lights on my car are illegal since they're fitted with American bulbs. But so long as your car or bicycle is showing the correct lights, who's ever going to know whether the bulb inside has a British Standard approval or not? I've not yet run into any cops or VOSA inspectors on the roads demanding to check the bulbs inside! Half the time nobody's going to notice whether the bicycle was made before or after 1990 anyway.
In simple terms though, the mandatory lighting for bicycles is summarized in Table III: A white light to the front, red light to the rear, red reflector on the rear. Add two amber reflectors on each pedal if it was made from October 1985 onward.
However.....
Section 4, General exemptions:
(3) Nothing in these Regulations shall require any lamp or reflector to be fitted between sunrise and sunset to-
{.....}
(c) a pedal cycle
So if you are only going to ride during daylight hours, you don't need any of them to even be fitted.