Strawberry Roots with White Fungus?

Hi,
Visited some friends today that have raised beds in a part of their garden and have been experimenting with growing strawberries in them. They have four of these beds with various things growing in them however, they've discovered some sort of white fungus growing on the strawberry's roots but is nowhere else in any of the beds?
They've taken them out and I've taken pictures of the white fungus to see if anyone could give me a clue if this is harmless, harmful etc?
Many thanks in anticipation ... :-)

 

Probably fine, a lot of plants form associations with fungi

 

Probably a good fungus I'd tend to think.
Or you might just get some good mushrooms at some point.