Joining Georgie Frost to discuss what the main market headlines of the morning are is Share Radio's Nigel Cassidy. Nationwide profit was down 16% on low interest rates. And shares in Twitter have ended the day more than 12% lower after the company reported that its fourth-quarter losses had nearly doubled. The social networking service reported a loss of $167m (£133m) in the final three months of 2016, as against $90m in the same period a year earlier.