Bosses are telling staff "sign up to a new contract which is worse or you’re out", says union boss Frances O'Grady.
No.10 said on Monday "further action" would be taken "if needed" to protect workers, but did not confirm whether or not statutory sick pay would be widened.
The TUC said more than two-thirds of lesbian, gay, bisexual and transgender people have been sexually harassed at work.
"It’s not an affordable option for most working families," says TUC
'We have to go from a culture of secrecy, to one of transparency.'
The TUC found the gulf has increased by more than half in 20 years.
Union boss: "It's like trying to put out a fire with a water pistol."