* FTSE 100 jumps 1 pct
* FTSE 250 up 0.5 pct
* Internationals top boosts to main index
* Rolls-Royce underperforms with 1 pct dip
* Wizz Air leaps on positive earnings update (Adds company news items, updates to closing prices)
By Muvija M and Yadarisa Shabong
April 2 (Reuters) - London's main index surged to its highest in nearly six months as exporter stocks benefited from a weakening pound on rising fears of a no-deal exit as parliament rejected all Brexit alternatives again.
The FTSE 100 .FTSE bagged its fourth session of gains on Tuesday with a 1 percent leap, outshining its counterparts in Europe and on Wall Street.
The midcaps .FTMC , whose members derive about half of their revenues from the UK, closed 0.5 percent higher, in a rare break from moving in tandem with sterling and another sign that Brexit uncertainty is upending conventional trading strategies.
The European Union warned that Britain could be heading for a potentially disorderly exit in 10 days time as Prime Minister Theresa May met with ministers to figure out ways to break the deadlock over terms of the departure. analyst Connor Campbell said both sterling and the midcaps seemed to be holding off until after a five-hour cabinet meeting today.
"On one hand, the lack of majority for any one option is shocking and a major blow as we are running out of time, on the other hand you could see it as nothing has changed," he said.
The pound's dip on Tuesday lifted the more internationally exposed components on the FTSE 100. HSBC HSBA.L , Prudential PRU.L , British American Tobacco BATS.L , pharmaceutical giants AstraZeneca AZN.L and GlaxoSmithKline GSK.L all advanced.
Shell RDSa.L and BP BP.L also lent support as oil prices hit their highest this year on the prospect that more sanctions against Iran and further Venezuelan disruptions could deepen an OPEC-led supply cut.
Swimming against the tide was Rolls-Royce RR.L with an 1.1 percent drop on news that Singapore Airlines SIAL.SI had grounded two Boeing (NYSE:BA) BA.N 787-10 jets fitted with Rolls-Royce Trent 1000 TEN engines after checks found premature blade deterioration. A CORNER
Industrials were among the biggest support to the FTSE 250.
"Overall, the atmosphere across equity markets is positive, mainly on those hopes that global manufacturing is turning a corner," said Chris Beauchamp, an analyst at Raymond James.
On news-driven moves, Wizz Air WIZZ.L jumped 5 percent on its best day since November after saying annual profit would be in the upper half of its previous range on "robust" demand. Air's update offered some respite to a sector that was pummelled after larger rival easyJet EZJ.L on Monday warned of weakening demand and softer ticket pricing. Airways-owner IAG ICAG.L and easyJet EZJ.L gained after steep losses in the previous session.
Fashion group Superdry SDRY.L underperformed with a 9 percent slump on its worst day this year after its shareholders voted to bring back its co-founder Julian Dunkerton to the board. A trader said his return could bring "conflict" in the board room.