https://www.childline.org.uk/ - a free, private and confidential service where you can talk about anything. Whatever your worry, whenever you need help, we’re here for you online, on the phone, anytime.
https://www.rlss.org.uk/Pages/Category/water-safety-information
https://www.capt.org.uk/drowning
As the summer approaches, please remind you children of the dangers around water. Sadly each year more than 700 people drown in the UK and Ireland and many more have non-fatal experiences, sometimes suffering life-changing injuries. The Royal Life Saving Society UK (RLSS UK), work to educate people to enjoy water safely, to keep their families and friends safe and to know what to do in an emergency.
http://www.juniorcitizen.org.uk/kids/railsafety/
Please also remind your children of the dangers of playing around railways and perhaps use this resource to remind them of some dos and don'ts.