There did of course use to be a lido in the 1980s. They are expensive to maintain. Southwark can't even afford to maintain its own public toilets; yathink they can afford to rebuild and then maintain their lido? No. They can't. It ain't gonna happen. Meanwhile, either demolish the building, or lease it to Wetherspoons or the cafe people "Peckham Rye Park Cafe North"!