Had to have a little play, managed to dig up a white and red LED, file off the heads so they're as short as can be which changes their viewing angle from around 15 or 25 degrees right up to almost 180 degrees, stuck some wire & resistors on them and then blu-tacked them to the ends of one side of the wheel axles:
PegLeds! (I wonder if I can trademark that?)
Looks much better than the camera can show, the front LED is a 3mm one and appears to be bright enough to give out additional side-viewing light for when going slow along unlit paths.
I'm just about to order a new front reflector & a big bag of LEDs because I'm going to double the brightness of my front light by mounting as many 3mm LEDs as possible in the new reflector - take that, you cars!
edit: I've just temporarily wired up two 3mm white LEDs with the ends cut off to remove their spotlight effect, one each side of the front wheel axle end and went out for a spin, they work better than expected as the road immediately round the front wheel is lit up very nicely, which also gives me another idea for my final lighting setup I'll be creating soon (the front reflector will have 45 3mm LEDs embedded in it
)