June 27 (Reuters) - British outsourcing company Serco Group raised its annual profit forecast on Thursday, helped by international immigration services contracts and acquisitions.

Serco, one of the suppliers which had supported the UK government's test-and-trace programme during the pandemic, said it expects full-year adjusted operating profit of 270 million pounds ($341 million), higher than its earlier forecast of 260 million pounds. ($1 = 0.7913 pounds) (Reporting by Prerna Bedi in Bengaluru; Editing by Savio D'Souza)