The Brighton office will remain open for its branch based service offering face to face advice.
Around 30 staff are believed to be affected for its telephone advisory service. Staff were informed of the relocation yesterday afternoon.
John Charcol would not comment on how many of its staff would be relocating to London.
John Charcol senior technical manager Ray Boulger insisted it had no plans to close any of its branches.
He says as the firm said previously, it would continue to make the changes that were necessary to put the company in a better position.