It is Nature's way of making new strawberry plants. Peg the end into a pot of compost and it will soon root, then you can cut the connection and have a new plant.
If the "parent" plant is young, I'd leave no more than one of those "runners" . Keep the energy in the parent plant for next year. If the parent plant is older, let them all grow and you'll have lots of free plants ready to fruit when the parents gives up ( usually around 5 years old ,or so )
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If the parent plant is older, let them all grow and you'll have lots of free plants ready to fruit when the parents gives up ( usually around 5 years old ,or so )
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.