Not many kid's songs in that lot. But here's a couple from childhood days with LEOs in:

Good King Wenceslas
Knocked a bobby senseless
Right through Woolworths window
Up came a copper with a rusty gun
Right you beggar, I'll make you run.

On the croft, on the croft
Where we played pitch and toss
And a copper came and chased us away
So I hit him on the head
With a bloody great lump of lead
And the slimy little bugger ran away