By Andrew MacAskill and William James LONDON (Reuters) -A scuffle broke out, one attendee was sick and excessive amounts of alcohol were consumed when workers at Downing Street held a party in the middle of Britain’s coronavirus crisis as the rest of the country was observing strict lockdown rules. The incidents happened at a leaving party on June 18, 2020, that began in the Cabinet Room and later moved to the nearby Cabinet Secretary’s room with the last member of staff leaving at 3:13 a.m. the following morning. The government’s former head of ethics, Helen MacNamara, attended for part of th…