There are fears that Soho queer spaces are disappearing, although others are springing up elsewhere.
The government says the new barriers would be installed at "fare dodger hotspots".
Aditi Vijay Paralkar, Rakesh Narayan Pai and their nine-year-old son Sid died in the fall last month.
A man, a woman and a child were pronounced dead at the scene in Elephant and Castle.
The musical, on the global threat of antibiotic resistance, features a chorus of 60 NHS workers.
Sainsbury's staff wrongly eject a man from a south London store over a facial recognition alert.
James Flanagan is accused of murdering Julie Wilson whose body was found at an address in Southwark.
The BL1, which links Waterloo and Lewisham, launches with free fares for its first week of operation.
Ask Bobby has been set up to honour Robin Windsor, a Strictly Come Dancing professional who died last year.
