Visited Brynmill Park again today. Was delighted to see my first Swallows of the year today - a flock of six flying over the lake. Later, up to a dozen or so were hawking over the water, often in heavy rain, and even in a hail shower. There were still large numbers of Willow Warblers flitting about in the bushes, along with some Chiffchaffs - some of the latter of which were singing. They sometimes came so close that I could have reached out and touched them. Also saw six Tufted Ducks (3 males, and 3 females), and a Sparrowhawk flying overhead.
Here are a couple of shots of the warblers: