Israeli Grapefruit are available in UK shops. Teruma and Ma'aser must be taken.
For further information about Teruma and Ma'aser click here

From August 2022 Israeli Grapefruit will be Shemitta produce after which they should not be purchased.
Israeli Potatoes are also on sale in UK shops. These are currently Shemitta produce and should not be purchased

For further information about Shemitta click here
For dates when Shemitta restrictions apply to different produce click here