Bryony Cross from The Royal Parks says the King's 'Big Help Out' initiative is an opportunity for people offer their time this Bank Holiday. One volunteer who took part in a wildflower planting event in Green Park said it was a "wonderful way" to commemorate the late Queen Elizabeth II. Report by Rowlandi. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn