Arabella Reeves’ third birthday this week was a special cause for celebration for mum Alanis, who feared the tot was “seconds” away from death at a Bishop’s Stortford pre-school when the cord of a roller blind tangled around her neck. Instead, the toddler is looking forward, with some trepidation, to a fresh start at a new nursery in September after the incident in May. Arabella, who turned three yesterday (Thursday, July 25) was at Appletree Pre-school, Windhill, when she became entangled in what staff admitted was “an extremely worrying incident”. Mum Alanis said: “It would only have taken a…