The UK boss of banking giant Citigroup has said its “business works best from being together” as the firm plans for staff to work from the office for three days a week.
James Bardrick said workers needed to be together “to get the best out of yourself and for the team”.
His comments come as other firms such as Goldman Sachs plan to get all staff back in the office after 19 July.
Some firms are also instructing staff to register their vaccine status.
Mr Bardrick, Citi’s country officer for the UK, said after restrictions were eased, the “vast majority” of staff would work from the office three days a week and have two days a week elsewhere.
However, Mr Bardrick told BBC Radio 4’s Today programme: “We strongly believe that our business works best from being together.
“We think that we are better together. We think we succeed for our clients and for our organisation together.
“So what we are saying is that, yes, use greater flexibility, but to do your job well, to develop as an employee, to get the best out of yourself and for the team, we need to be together.”
Mr Bardrick said the bank was not copying JP Morgan’s policy on vaccination status, but added anyone entering a company building had to “demonstrate that they have got a negative test result”.
JP Morgan, the biggest bank in the US, has instructed its US staff to register their vaccine status on an internal web portal, with its boss Jamie Dimon previously saying he wanted staff back in the office from July.
Meanwhile, Goldman Sachs told the BBC it was mandatory for US staff to share their vaccine status but voluntary for UK workers.
NatWest has said just over a third of its 59,300 full-time employees in the UK would continue to work remotely. Some 55% of its staff would adopt a hybrid model of working, splitting their time between the office and home.
Morgan Stanley has barred staff and clients from entering its New York offices if they are not fully vaccinated.
An internal memo, first reported by the Financial Times, said: “Starting July 12 all employees, contingent workforce, clients and visitors will be required to attest to being fully vaccinated to access Morgan Stanley buildings in New York City and Westchester.”
A person familiar with the policy told the BBC: “Operating within a fully vaccinated environment allows us to lift restrictions like the use of face coverings and the need to maintain physical distancing, returning to more normal office conditions.”