Knocking tapping noise

[Reeflodge]

My 2 has developed a knocking/tapping noise
someone said it could be a pulley so I'm going to take the belt off and run it at the weekend to see if it stops.

Any ideas what else might cause it?

Have a listen

https://youtu.be/4GrdPSbYzNY

[Carolyn]

Have you got Facebook set to Friends only?  Link doesn't work for me.

[Reeflodge]

Have you got Facebook set to Friends only?  Link doesn't work for me.

Sorry about that, try now I have uploaded it to youtube.

its the knocking in the background!