Bryony Boyce, aged 6, of Cathedral School in Llandaff, Cardiff won a competition by designing a poster to promote child safety in relation to construction sites.   The National Federation of Builders’ (NFB) increasingly popular and multi-award winning STAY SAFE campaign aims to raise awareness and educate children so they know not to enter construction grounds in an unauthorised capacity.   Statistics released by the Health and Safety Executive (HSE) have shown a decrease in the number of children that…