I for one wouldnt divert to Brum as that would involve being messed around by atc for god knows how long AND the need to fly over congested area ..... i think the pilot made right call ...just bad luck it was a school
How many of us havent landed not knowing what the field is ? I once did it and ( luckily before i had closed down ) a load of prison guards came running across the field thinking it was a break out !! I repositioned pretty quick .
I dont think its a good thing to do and isnt helpful to our cause .....but it will happen now and again regardless of rules .....it just should happen often !!
( as for being guided by some random dog walker .....he may be a rabid anti and sending you towards the telephone lines .....)