Velux Duo blackout blind (Hertford SG14)

From a GPU size UK08 Velux - size 134x140
This is offered complete BUT the chord has frayed preventing the blackout element going fully down , and so will need recording - it is less than 6 months old so so in good condition
Of someone is interested in re-chording it then I think the fact the chord is still in tact may make
It a little easier than if it was broken
There are instructions on YouTube but I really wasn’t able to understand how to do it
Picture one is just to show what the type of blind is
Will be re-packed into box we got with replacement and have all fixings and instructions