the west ham defender says jack grealish should follow his heart when choosing ireland or england .
in 2012 , a year after his big move from charlton to the club he supported as a boy - arsenal - the essex-born full-back chose the three lions despite having played for finland , the nation of his mother , at under 18 and under 21 level .
it was a great experience at the time because i was playing against some of the best teams in the world .