Complex sentence: From 1921 to 1959 the building was used as a Lyons Corner House and it is now a branch of the Co-operative Bank, with ORC International, a market research agency, occupying the floors above the bank.
Split into simpler sentences: From 1921 to 1959 the building was used as a Lyons Corner House. It is now a branch of the The Co-operative Bank, with ORC International, a market research agency, occupying the floors above the bank.