Welcome to the forum margaret. The idea seems to be exactly what has been posted, namely,
''BIRMINGHAM’S very own city centre beach returned today when it was officially opened in Chamberlain Square.'' - (This is absolute City Centre)
''This year’s beach promises to be bigger and better than ever and will cover 577 square metres and make use of over 110 tonnes of sand.'' - (6,210 sq ft / 690 sq yd)
''Free and open daily, the beach has proven to be a popular family friendly attraction since it was first built in 2006 and last year attracted over 100,000 visitors.''
People seem to like it, some folk'll make a few bob out of it one way or another - nothing new there, but at least it's popular.
I'm an expat too, and like you, had never heard of it this or any other year until this post.
Once again, welcome to the forum - there's a mixture of people still in brum or ''outskirts'' like Solihull, others elsewhere in the UK, and people like us. Just get stuck in as you have; it's friendly and pretty easygoing and you're free to put in your oar about anything you like including starting a new thread or three.
tramp