When Ian Coull moved from Sainsbury's to become CEO of Slough Estates (now Segro) in 2003 he was embraced as a the person who could shake up the company. After a few years his critics had become more vocal about the perceived lack of progress in transforming the company’s fortunes. But the unexpected takeover bid for longstanding rival Brixton in May is set to transform Segro into the largest industrial real estate investment trust (REIT) in Europe with EUR 6.4 bn in property.