We all exaggerate in aviation!! Perhaps that 250ft was really 1250ft etc etc. The fact always slowly go in favour the more dramatic exageration - maybe we should discuss the interesting topic rather than pat ourselfs on the back for being keyboard warriors!
The only time I have been in thick cloud was to get "on top" once - my instructor switched us temporatily to IFR and when we broke out we were still in the ATZ at Shoreham I would guess. Not sure how I'd feel relying on London Info to get me through though.