Sterling slips against rallying euro as political risks weigh

* Graphic: sterling and gilt yields http://bit.ly/2dgAXn1

* Graphic: World FX rates in 2017 http://tmsnrt.rs/2egbfVh

* Graphic: Trade-weighted sterling since Brexit vote http://tmsnrt.rs/2hwV9Hv

By Jemima Kelly

LONDON, Sept 4 (Reuters) - Sterling lost more than half a percent against the euro on Monday, with the single currency up broadly as worries over North Korea drove a flight from riskier assets, and as domestic political uncertainty kept the battered pound under pressure.

Data showing growth in Britain's construction sector hit a one-year low in August - hurt by an investment slump in the commercial sector as Brexit uncertainty weighed - had little measurable effect on the currency.

Analysts said Tuesday's data from the dominant services sector would be more important.

Numbers on Friday showed speculators added to their bets against the pound in the week up to last Tuesday, on the back of weak economic data as well as uncertainty about Britain's departure from the European Union.

Prime Minister Theresa May warned lawmakers over the weekend that Britain could be faced with a Brexit "cliff edge" if they failed to back her EU repeal bill, which is to be debated in parliament on Thursday.

May failed to win a clear mandate at a snap election in June and only has a slim majority in parliament that rests on an agreement with a smaller party. She (Munich: SOQ.MU - news) remains vulnerable if pro-European lawmakers in her Conservative party team up with other parties to vote down legislation or support amendments.

Finance minister Philip Hammond urged lawmakers on Monday not to seek to delay the legislation.

"If we manage to get through this bill without any major hiccups, you would expect sterling to get a bit of reprieve from that," said ING currency strategist Viraj Patel. "(But) I wouldn't read too much into all the Brexit stuff that's going on this week - there's going to be a lot of noise."

On Saturday, May's deputy advised Conservative lawmakers against doing anything that would increase Labour's chances of returning to power, while May said the bill was the best way to ensure a successful Brexit.

"This is a major test for PM Theresa May," wrote Morgan Stanley (Shenzhen: 002588.SZ - news) analysts in a note to clients. "Our economists ... still seeing a high likelihood of a general election as Brexit talks finish in late 2018."

Against the dollar, sterling slipped 0.2 percent to $1.2917 .

It was down 0.7 percent against the euro at 92.23 pence , with traders cautious following Sunday's news of North Korea's sixth and most powerful nuclear test, which prompted the United States to warn of a "massive" military response if it or its allies were threatened.

With (Other OTC: WWTH - news) market closed in the United States, trade was thin. (Reporting by Jemima Kelly; Editing by Alison Williams)