I've just been reminded of a childhood memory of my grandparents (no longer with us) taking my brother and I to a beach and we paddled/played in a shallow pool of some sort that had seawater in as I remember it being really salty.
I had always assumed it was Frinton but I can't now see anywhere that would be! I remember it being almost in some gardens with my grandma sitting up nearby watching us. I don't think it was a proper cut-out outdoor pool but more like a shallow marine lake. Yet 'manicured' enough that it wasn't just part of the sea. But couldn't have been far! I'm probably misremembering a lot - this would've been late 1980s/early 1990s. More likely to be around Southend but looking at satellite on Google maps I can't see anything like it.
I'm beginning to think I imagined it and it was actually the sea. Does anyone know/remember where this might have been?