This is really the longest evening
Blogs everywhere on Midsummer day proclaim that from then on the evenings will be getting shorter - not true!
The evenings continue getting a little longer for several days afterwards, and conversely the earliest morning occurs a few days before midsummer's day.
In Newcastle it doesn't quite get dark at this time of year, nautical twilight does not end. Nautical twilight corresponds to when there is still enough light to see the horizon even when there is no moon so that mariners could still reliably navigate by the stars.