too narrow, too mean. the government is providing humanitarian aid to help refugees close to ukraine's border, but it says the success of its new scheme will depend on the generosity of the british people. iain watson, bbc news. let's hear now from the president of poland — andray duda — whose country is front and centre of the ukrainian refugee crisis — with more than a million and a half people having crossed the borders since the start of the russian invasion. there's also the potential threat of russia using chemical weapons in ukraine — and we've already seen russian missile strikes on ukrainian targets just a few miles from the polish border. my colleague sophie raworth has been talking to president duda, and she began by asking him how concerned he is about the potential use of chemical weapons.