Sept 28 (Reuters) - Oxford Nanopore IPO-ONT.L has priced its London initial public offering at 425 pence per share, a bookrunner said on Tuesday, giving it an expected market valuation of around 3.6 billion pounds ($4.92 billion) including its use of a greenshoe option. The IPO of the provider of rapid COVID-19 tests to Britain’s national health services would be significant for the London Stock Exchange as most British pharma and life science companies tend to list on New York’s Nasdaq. ($1 = 0.7311 pounds) (Reporting by Pushkala Aripaka in Bengaluru; Editing by Sriraj Kalluvila) Our Standards: The Thomson Reuters Trust Principles.