An article in The Guardian talks about the leakage of radioactive materials from silos into the soil in the area.

It has been known for a long time that there have been cracks in the silos that have caused leaks, but they have been difficult to find and fix. Improvements have been ongoing for many years. The improvements are intended to increase safety at the storage facility. In connection with these improvements, a limited release of radioactive materials into the environment has been authorized. Both the UK's Nuclear Safety and Environment Agency supervise the construction and closely monitor that the emissions are within the permitted limits.

The impact of the release into the soil is local and does not affect Iceland.

It is Icelandic Radiation Safety Authority's assessment that, based on the available information, there is no chance that it will be possible to measure the impact of this permitted discharge, in Iceland. The Icelandic Radiation Safety Authority will continue to closely monitor news coverage and developments in Sellafield. 

The Icelandic Radiation Safety Authority regularly measures radioactivity in the sea off Iceland in collaboration with The Marine & Freshwater Research Institute, which is in charge of sampling.