Maybe our little friend from Belgium will be around shortly with a dissonant opinion...
But as far as I'm concerned, well done. I don't know too much about specific UK weather, but here in the Netherlands after a high pressure area has been stationary, close by, for a few days, particularly in winter, there's a lot of haze developing below 1500". From the ground straight up, just bright blue skies. From the sky down, murky as hell. You can recognise these conditions by looking at the horizon from the ground: if there's a distinctly different color in the atmosphere about two fingers up from the horizon you've got to take care.
It's usually caused by an inversion layer trapping stuff below it. So it helps to pay attention to the temperature vs. altitude gradients in the weather charts. The metoffice forms 414/415 (or the UK equivalents) are good for this but you can also use sites like
www.wetterzentrale.de/topkarten to look specifically for the temperature graphs from balloon ascents.
To make matters worse, in light wind conditions the preferential runway at Rotterdam is 24, which is exactly into the setting sun. Fortunately ATC recognises these conditions and turn the lights on early. So far I've managed but in conditions like this it would probably be safer to ask for 06 and accept a slight tailwind on landing.