April 7 (Reuters) - UK shares ended lower in

broader-based losses on Tuesday, as investors turned risk-averse

heading into U.S. President Donald Trump's deadline for Iran to

open the Strait of Hormuz with no compromise in sight.

Trump threatened that "a whole civilization will die tonight" as

Iran showed no sign of accepting his ultimatum to open the

Strait of Hormuz by Tuesday evening, Washington time.

The blue-chip FTSE 100 index dropped 0.8% to

10,348.8 points at close, while the midcap FTSE 250 slid

0.4%.

* Trump has given Iran until 8 p.m. in Washington to end its blockade of Gulf oil.

* Trading in the UK picks up on Tuesday after a long weekend

break where markets were shut for the Good Friday and Easter

Monday holidays.

* The blue-chip index briefly hit an over one-month high

earlier in the day, but Tuesday's fall meant snapping a four-day

winning streak.

* Aerospace and defence lagged, declining

2.6%; shares of Rolls-Royce fell 3.9%.

* Travel and leisure shed 1.9% with airline

stocks particularly hit as crude oil prices climbed amid the

volatile situation in Iran.

* Oil and gas was a bright spot, rising 0.8%

tracking higher crude oil prices.

* Heavyweight banks lost 0.8%, while

pharmaceutical and biotech shares fell 2.2%.

* On the data front, a survey showed that businesses in

Britain's services sector reported the biggest month-on-month

jump in costs in March since 2021.

* A U.S. inflation reading due later this week would be on

investors' radar for more clues on the Federal Reserve's

interest rate path.