BUZZ-Go-Ahead Group: falls as train delays and bus woes mount
** Transport company Go-Ahead Group falls 5.7 pct after Liberum downgrades to "neutral" from "buy"
** Broker says disruption at its GTR Rail franchise following timetable changes means caution is still warranted
** UK transport secretary Chris Grayling said on Wednesday https://www.bbc.co.uk/news/uk-england-44299902 the company's service had been "wholly unsatisfactory"
** Liberum adds co's regional bus performance has been disappointing (co guided for flat revenues in H2 YoY)
** Top faller on FTSE 250 index