Looking out the window on a cold and miserable June afternoon yesterday reminded me of similar such days during the Seventies and Eighties.
But the mind plays tricks and I wondered if these kind of days were that common in the past.
To weed out the also-rans qualifying days had to be sunless with an anomaly that was at least 4C cooler than the daily average and rainfall of at least 12mm.
This gave the following list.
So, in the last 60 years there have been only 12 days similar to June 10th 2019. That would give a probability of less than 1% (0.00743)
Looking elsewhere it would appear that there was much more rain to the north, south and west of Wanstead.