For me it has to be the Ottery St Mary storm.
https://www.metoffice.gov.uk/learning/learn-about-the-weather/weather-phenomena/case-studies/ottery-hail
http://www.dailymail.co.uk/news/article-1081758/Hailstorm-swamps-small-town-6ft-drifts--October.html
I lived nearby about 15 miles away. We spent the night with constant lightening so bright we didn't need to put the light on to calm my daughter
The following morning I set off for work (at the Met Office) and was listening to the local BBC news interviewing a farmer in Ottery St Mary saying he had 'snow' in his farmyard feet deep. I was confused as I was now about 3 miles away and no sign and this was October and not that cold. Went to go over the river and a guy was stopping everyone saying the bridge was flooded. Long alternative trip to work. When I got there I was gobsmacked at the data (see above)
I do remember the day before there was a huge wall cloud straight outside the Met Office and Mammatus cloud on the way home but this caught everyone by surprise
Having lived out in the Middle East for a few years I can concur that it never gets below 40c in the 3 summer months.
I watch with interest to see if this year is likely to be a record setting year
Ah, bit further North than me. Hope there's only sleet for my return journey. Been I while since driving in snow, although it's similar to driving in a sandstorm, just the temperature is different
Roads weren't too bad but standing water will be a problem soon. Sleet showers turned to rain
some great icicles in Darlington unfortunately I can't upload any pictures