As the number of coronavirus cases rises, England's deputy chief medical officer expressed his concerns. Professor Jonathan Van Tam said people have "relaxed too much" over the summer and "we have got to start taking this very seriously again". If not, the UK will have "a bumpy ride over the next few months," he warned. He said that infections among younger people in EU countries had later filtered through to older age groups. On Sunday UK authorities announced 2,988 new cases - the highest figure since 22 May, while a further 2,948 cases were reported in the 24 hours to 0900 on Monday. Up north, lock-down restrictions were extended to the West of Scotland and a local one was put into place in the county of Caerphilly. In transport news, travellers arriving in England from seven Greek islands will have to self-isolate for 14 days from 0400 Wednesday, Transport Secretary Grant Shapps said. The islands affected are Crete, Lesvos, Mykonos, Santorini, Serifos, Tinos, and Zakynthos (also known as Zante). The government said islands could be treated differently from their mainland countries if infection rates differ. In Brexit news, the government will introduce a new law that could change post-Brexit customs plans with the EU - but No 10 denied it would "tear up" the existing treaty. The two sides agreed in 2019 on the terms of the UK's exit, including on future trade in Northern Ireland. Reports suggested a new law could "override" the legal force of that deal - the withdrawal agreement. Finally, a 15-year-old boy was seriously injured in a shooting as he made his way to school. Officers were called to the Grange Farm estate in Kesgrave, Suffolk, where a person was later seen receiving medical treatment.