Opening Bell: Belfast's Brexit legal challenge, Ireland's Halloween boom, EY Entrepreneur of the Year results

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The High Court in Belfast will deliver its judgment in a legal challenge against Brexit this morning.

The case follows the UK's decision to leave the European Union - without the consent of the people of Northern Ireland.

A cross-party group of Northern Ireland Assembly members and victims campaigner Raymond McCord raised their objections during a three-day hearing earlier this month.

Mr McCord's Lawyer, Ciaran O'Hare says either way he's pushing for the case to be heard in the Supreme Court:

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Irish retailers have reported an increase in Halloween spending.

"We saw the Halloween trend in the US moving across the water," founder Vincent Lynch told Newstalk.com. "It is the one season that's growing for retail, it's bigger every year."

"It’s a selfish season, not like Christmas. You are buying things for yourself," the businessman added.

Retailers hope that the big day falling on a Monday will result in Ireland's biggest-ever Halloween shopping spree, as Halloween HQ says there are "three whole days" of long-weekend spending on the way.

Meanwhile, Tesco Ireland is expecting pumpkin sales to be 30% higher than last year.

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Brendan Mooney of the Kainos Group has been named the EY Entrepreneur of the Year.

The CEO of the Belfast-based software firm scooped the top prize at an award ceremony in Dublin’s City West Hotel.

Paul Quigley and Andrew Mullaney of NewsWhip picked up the award for best emerging entrepreneur. Their Dublin-based technology group, which was founded in 2011, tracks trending online stories for media clients such as MTV, Buzzfeed and the Huffington Post.

Property veteran Stephen Vernon, chairman of Green Property, secured the industry entrepreneur prize.

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Alphabet, the parent company of Google, has reported a 20% jump in revenue in its latest financial results.

The firm says it was pleased with the sales of advertising on mobile devices and YouTube.

Revenue in the third quarter of the year rose to €20bn.