Ten workers are held over the alleged mistreatment of hospital patients following a BBC investigation.
Four Conservative MPs have already said they want the job - with more expected to follow.
Four more children are in hospital as a man and woman held on suspicion of murder are questioned.
Senior cabinet ministers expect the PM to outline a timetable on Friday for her successor to be chosen.
The Leader of the House, Andrea Leadsom, stepped down on Wednesday over the PM's Brexit policy.
Should the United Kingdom remain a member of the European Union or leave?
On 23 June 2016 the UK held a referendum and 51.89% of voters voted to leave the EU.
Bob Higgins, who 'held supreme power' over young footballers' careers, is convicted of 45 offences.
UK voters will send 73 Members of the European Parliament (MEPs) to Brussels and Strasbourg.
Atmospheric observations pinpoint eastern China as the source of rise in ozone-destroying chemicals.
Several cabinet ministers tell the BBC the PM cannot stay on as the backlash to her Brexit plan grows.
Undercover BBC filming shows staff swearing, mocking and taunting patients with learning disabilities.
A tourist says doctors 'did great things putting me back together' after the London Bridge attack.
Theresa May says MPs will get vote on whether to hold another referendum if they back EU Withdrawal Agreement Bill
The UK's second-biggest steel maker has been seeking £75m in government backing to help it stay afloat.
UK celebrity chef Jamie Oliver’s restaurants go into administration, putting up to 1,300 jobs at risk.
The three-time world champion is famous for staging an audacious recovery from a near-fatal crash.
Polls open in Australia's general election, as Labor seeks to defeat Prime Minister Scott Morrison
Eight of the 100 people stabbed to death in the UK have been in the West Midlands area.
Kirsty Boden said 'I have to go help', but was stabbed as she knelt over a dying victim, an inquest hears.