Tartar sauce & mayonnaise for Fish and Chips, Cooking Rice

I'm making fish and chips so need some tartar sauce. The recipe below looks pretty straightforward.
I might try making the mayonaise again too.

mayonnaise:
I tried this one and it didn't thicken, I did usw mustard grainy instead of smooth mustard but I was whisking for ages and it didn't thicken at all. Maybe light on the oil, it did say 150ml which is quite a bit and I think I only used half of that.
Still good for the tartar sauce with fish and chips.

A vid on cooking rice:

this method worked really well, although I did forget to let it stand for 10 min afterwards for the first portion. A good video.