Credit Suisse and Deutsche Bank have made 150 and 30 jobs redundant respectively in their investment banking divisions.
The redundancies follow threats of job losses in Lehman Brothers’ London-based real estate team.
Citigroup is understood to be laying off almost 400 jobs in London, mostly in its fixed-income business.
The bank said it would cut 4,200 jobs worldwide after losing $9.83bn (€6.67bn) on mortgage write-downs in the fourth quarter of 2007.
Other banks, including UBS and Merrill Lynch, have also made job cuts since the emergence of the subprime mortgage crisis in the US, which also prompted Capmark Europe to halve the staffing level of its 26-strong lending team.