ALL-NIGHT running on the London Underground will not begin until Mayor Boris Johnson “rewards and respects” hard-working staff, unions said yesterday as negotiations over the service resumed.

The Night Tube’s planned September launch was called off after the capital’s transport network was paralysed twice in a month over the summer.

Tube workers are concerned at being forced to work countless night shifts with inadequate rewards and safeguards, saying they would cause huge disruption to family life.