Since I started this, thought I should follow up.
I had a sudden inspiration to go fishing on Monday, 17/4/23, and decided to give Deep Water Bend a go. Had in mind to try out a number of spots there but ended up starting on one of the fishing platforms and stayed there. HT was due at 7.54pm, but couldn’t resist going out about 3.30pm (nothing else to do). I didn’t have any burley on hand but I did want to try out mangajack's idea of fishing very close in to the rocks using no weight. It was a difficult because the tide was running and when I cast up-current the bait would just shoot past me before it even went to the bottom. I did try putting on a little weight (up to a no.1 ball sinker) but it was still running past me, so I went back to no weight.
The good news is that I was getting bites from the get-go, even when the line had tensed up. They were clearly bream because I managed to hook 6 of them, but 5 were undersized (maybe one of those just on 25cm), which is what Jono suggested. I did take home a 28cm one for tomorrow’s dinner. Missed a fair few as well, and I think some of those were a decent size. The bites slowed down as the tide eased off (just when it became a lot easier to drift the bait), but as the breeze settled down and the water was still, it was a beautiful night at a beautiful spot. Left about 7.30pm – still a few nibbles then. Didn't catch a 'decent' fish, but I thought the photo would be more meaningful. Biggest lesson: Take Mortein.
Tried again about 10 days later. By chance, around the same tide time and I arrived at 4.30pm. Again, the bait was drifting past quickly but even on a tense line I was getting bites from the get-go, but only landed three and they were all small. 2 undersized bream and – shock! - a baby dart about 5-6 inches long. I thought you only get those in the surf, but the book tells me they are found in estuaries as well.
Postscript: On the first trip I put the Mortein on late and over the next few days I suffered a bad allergic reaction to insect bites on my legs – lasted for a week. Second time around I was bathed in Mortein from the start but the bugs still found a few spots to bite (eg behind the ear, under the shirt at the front – not tucked in). It was less widespread but still had a bad reaction. I will give it another try but next time not at sunset.