Question: The Type 31e frigate, also known as the Type 31 frigate or General Purpose Frigate (GPFF), is a planned class of frigate for the United Kingdom's Royal Navy intended to enter service in the 2020s alongside the more advanced Type 26 frigate, a class of frigate being built for which organization of the United Kingdom?
Sentence (from "General Purpose Frigate (Canada)"): Following the cancellation, a modified version of the design was used for the "Iroquois"-class destroyer s.
Relevant evidence: No