leaky shower

[loted932]

Please can someone advise how to fix this shower that leaks?
I guess I need to replace the washers inside the taps. Is it the blue or red one? My local DIY place didn't have the washer last time I attempted this.
The cold tap is the culprit, a bit soft to tighten and leaks unless really tight. The hot does a bit too.
Thank you

 

[ShaunCorbs]

Leaking out of the shower head / spout ?

 

[loted932]

Leaking out of the shower head / spout ?

shower head

 

[ShaunCorbs]

Red arrow then

Tap washer like the one you changed on the cold