As a precautionary measure, Greenyard Frozen UK Ltd. is recalling various frozen vegetable products because they may contain Listeria monocytogenes, which can cause listeriosis. Listeriosis is a serious disease which can be life threatening, particularly for pregnant women.
Dunnes Stores and Spar are also recalling their own brand pestos, due to the possible presence of salmonella. This can also be dangerous for pregnant women.
If you have one of these batches, don’t eat them. Dispose of it, or you can return it to the store where you bought it. 
More information from the Food Safety Authority of Ireland can be found at the links below.