Flying in haze towards the sun is a real bitch
Every year seems to get worse, or maybe its just my eyesight and memory!
One problem is always knowing wher the top of the haze is, and whether its worth 'trying' to get on top.
It's worth knowing that the forecast inversion 'top' for different areas of the country is available on the Met Office website for free, (but you have to register) - its just in a slightly inconvenient place for the majority of GA - go to the ballooning section from the main aviation page:
Start here
I am nagging them to duplicate it over to GA pages or at least link it.