Lenders including Precise Mortgages, CHL and Moda are withdrawing and repricing their fixed rate ranges.
The Iran war has already caused a rise in swap rates, causing many lenders to hike mortgage rates and reprice their ranges.
Zephyr Homeloans will be increasing its fixed rates on 24 March.
The lender said this was due to “ongoing movement in the global markets”.
Precise Mortgages withdrew several mortgages on the evening of 19 March due to “unprecedented market conditions”.
The lender has withdrawn its residential tier 1 and 2 ranges and its 55-75% LTV products across all ranges.
Similarly, Rely withdrew its range on the evening of 19 March and will relaunch a new range on 20 March, citing unprecedented market conditions.
CHL Mortgages for Intermediaries is withdrawing its CHL1 product range from 5pm on 20 March.
Moda Mortgages is withdrawing its limited edition range at 5pm on 20 March.