Can anyonr Identify?

Can anyonr Identify?

Observation - Can anyonr Identify? - UK and Ireland. Description: i saw this smaller spider binding and eating the larger one? It is about the size of your little finger nail and has 2 rows of 4 spots on its back. Ive never seen this type of spider, does any one know what it is? Many thanks

i saw this smaller spider binding and eating the larger one? It is about the size of your little finger nail and has 2 rows of 4 spots on its back. Ive never seen this type of spider, does any one know what it is?
Many thanks