Oil prices slid on Tuesday, extending losses of nearly two per cent in the previous session, as a stronger US dollar and a flare-up in Covid-19 cases in China raised concerns of slowing global demand. Brent crude futures fell 27 cents, or 0.3pc, to $95.92 a barrel by 0342 GMT, after falling $1.73 in the previous session. US West Texas Intermediate crude was at $90.73 a barrel, down 40 cents,