Aha! So you did it on purpose! LOL
See. That I didn't know.
I kept waiting for her to lay her hand on his shoulder, showing she's still there, by the sea, by his side, in yet another "Northern Summer". There's enough reality in reality. I ALWAYS want the fantasy of boy meets girl, boy gets girl, even if boy loses girl, but gets her back at the end. 
What about the idea of repeating "Northern Summer" a couple times at the end of the Chorus?Melodically, and Lyrically, that emphasis on those words could focus the listener on the overall concept.
And the extended Instrumental Bridge can work, now that I know your intent. I think it does have that effect of extending the mood of the Verse and Chorus.
I would still argue for the 'step-up' for the Chorus. Listeners can tune out if it's too monotonous, too 'trance-like', too droning, too much Repetition; not enough Change. The function of the Chorus 'step-up' is to renew listener interest. The function of a Bridge is too. It's the elusive 'enough' concept. How much Verse is 'enough'? How much Chorus is 'enough'? How much Repetition? How much Change? 'Enough' is the Songwriter's judgment call. The listener will also decide, making their own judgment call, and, if it's 'too much 'or 'not enough' they may tune out, come 'UnHooked', drift off to other thoughts, and only notice they haven't been listening when the Song ends.

"NORTHERN SUMMER" or "In Our Northern Summer" or "Our Northern Summer"
(Words & Music by Gavin Sinclair)

The night when we ran naked into the sea
In the lingering light of a Northern Summer God made just for you and for me
We lay on a rock and I felt you breathing
As the water ran down in little streams
Over your shivering skin and into my dreams

Do you remember how it was?
Just kids and just because
We were in love, I was in awe
Of how beautiful you were,
In Our Northern Summer
In Our Northern Summer

Now here I stand, with the waves kissing the sand
In the dying light of that long-ago summer, where I reach out and touch your hand
I sit on the rock and I feel you breathing
Where the water ran down in little streams
Over your shivering skin and into my dreams

I remember how it was?
Just kids and just because
We were in love, I was in awe
Of how beautiful you were

In Our Northern Summer
In Our Northern Summer

"I remember how it was" definitely stands out in the song, but I have to admit I'm expecting a different chord on "was".... The mix is way better with the harmonica pulled back IMO. What kind of compression are you using Gav? Your recordings are always SO LOUD!!  🙂

Out of interest, what chord were you expecting?

I'm using a preset in the Izotope Ozone Elements mastering tool. I don't set the compression individually, just select a preset and then make some adjustments. It's actually louder before the adjustments LOL. SoundCloud doesn't change the volume to fit their parameters and ensure consistency the way Spotify, etc. does, so if you are listening to a song with a lower volume and then a louder one comes on, hold onto your hat!

Try G-F-C-D.... throw an A in there 2nd time around  🙂