I've no idea whether there's any truth in this rumour, but I'd be inclined to treat any promises of swimming pools or leisure facilities with a huge dollop of salt. Some years ago, I lived in the immediate vicinity of a proposed major supermarket development. Before planning permission was granted, the company concerned (not Tesco, I should say) made extensive promises about the leisure and community facilities that would be built to replace those being lost to the development. They even organised an exhibition so that local residents could view plans and models of the new facilities. Perhaps needless to say, once permission was granted and the supermarket built, none of the promised facilities ever materialised. It's very hard for local authorities to enforce planning conditions retrospectively, unless they're prepared to engage in costly and potentially risky legal action.