front mudguards

[krazyquiff]

im thinking of ditchin my front mudguard would i get any grief of the old bill for riding without 1.

[Bassman]

it's possible that you will... However my chop has no front guard, and never has had one, even passed mot without it?? and i have never been stopped yet? You don't half get wet thought, if you ride in the rain... :(

watch me get done now tho eh!!

[Alik Windrush]

As far as I'm aware the only definition of a mudguard is something which covers the full width of the tyre. Nothing about circumferance. So a fork brace would be more than adequate.
However:- for Mot purposes, a quirk of motorcycle testing (as opposed to cars) is that if the tester doesn't like something he can refuse to test it.