May hit back by arguing Labour had not tackled the issue during the party's 13 years in office.
Labour's former shadow foreign secretary Hilary Benn will lead the questioning of Davis.
Former Ukip leader issued the warning as he addressed the European Parliament.
Institute for Government says Whitehall 'urgently needs' to prepare for negotiations with the EU.
House of Lords sub-committees say continued involvement in the customs union could be important.
House of Lords' EU Committee urged Whitehall and Brussels to recognise 'unique' relationship.
Financial firms fined a combined £22.2m this year, compared with £905m a year ago.
Lagarde was the French finance minister when the state awarded a £340m payout to Bernard Tapie in 2008.
British financial watchdog calls for sweeping changes to crowdfunding rules and regulations.
The move has been inspired by Thomas Piketty's work aimed at tackling inequality.
HSBC, Credit Agricole and JP Morgan fined following five-year investigation into Euribor rigging scandal.
Fine relates to the price of phenytoin sodium capsules going up dramatically in 2012.
John Longworth, co-chair of Leave Means Leave, spoke to IBTimes UK about the 'clarity' debate.
Conservative premier also remained defiant on her 'no running commentary stance' as she faces a rebellion.
Michel Barnier wants to complete talks with the UK by October 2018 and ratify the deal in March 2019.
Shares in spread-betting firms plunge by about 30% after regulator unveils proposal to regulate CFDs market.
UK prime minister under pressure after ruling out giving a 'running commentary' on EU talks.
Iceland Foods chief executive Malcolm Walker claims Icelandic authorities have 'no interest' in resolving the matter.
Source close to Labour leader told IBTimes UK the progressive politicians will dine with the shadow cabinet.
The talks were meant to remove important tariffs on 'green goods'.
MEP Gerard Batten attacked the Brexit Secretary after his admission in the House of Commons.
Britain's telecoms watchdog says it is particularly concerned for elderly and vulnerable customers.
Parliamentary committee hears a new product license may be needed after exiting the EU.
Barclays and Standard Chartered fall short but will not have to increase capital strength.
New Brexit spokesman Gerard Batten MEP announced the policy with his appointment.
Business Secretary Greg Clark proposes pay ratios show earnings gap between a chief executive and an average worker.
Financial regulator to launch a broad investigation of 'high-cost credit' with findings to be released in summer 2017.
EU Parliament's chief Brexit negotatior spoke to IBTimes UK about the US, Nato and David Davis.
Prime Minister Theresa May is set to crack down on boardroom excesses.
Joseph Muscat issued the warning to Theresa May ahead of his country taking over the EU Council presidency.