webGL standard shader displays badly

In the Editor / webplayer, my objects display fine:

When built to webGL however, I'm getting quite a nasty result..

I'm surprised noone else seems to be talking about this if is a standard shader issue. I am thinking I have some issues with my game settings. I've tried different fixes however to no avail...

• Am using 5.1.3p1

• Crunch texture compression

• Fantastic quality

• Medium mesh compression

• Optimise mesh

Anyone able to enlighten me? Hope so! Thanks in advance