Singer, songwriter, straight, gay, father, activist and important enough to a second-tier North London football club to have a stand named after him: Elton John’s certainly led a colourful life. Similar colour in his life show, then, is something of a given. Tonight’s one hundredth show of 2014 and the final date of a tour commemorating 41 year old classic ‘Goodbye Yellow Brick Road’ starts with an old school rock n’ roll bent. ‘Funeral For A Friend’ and ‘Bennie and The Jets’ lead the tributes to one of Elton’s finest records, the former preceded by an epic piano lead in which sets the…