BUZZ-UK REITs: CS sees limited upside; cuts Derwent London, Great Portland

** Credit Suisse says it cuts Derwent London PLC and Great Portland Estates to "neutral" from "outperform" due to a lack of positive catalysts and ongoing Brexit downside

** "We see limited value upside potential for London office with the remaining potential for Brexit to cause a downturn," CS says

** Says leasing activity has also slowed into 2019 with a decline in take-up in Q1, and decision-making is taking longer

** Says remains supportive of long-term business models to focus on value-add through asset management and redevelopment coupled with modest financial leverage

** However, it remains concerned about potential for a market correction given recovery of the last decade and possible disruption ahead from Brexit

** Derwent London and Great Portland Estates shares are down 0.3% and 0.4% respectively (Reporting By Geetha Panchaksharam)