There is also Zen Internet who are cheaper than AAISP. They provide a static /48 subnet allocation that you can divide up into 2^16 /64 subnets.

Unfortunately IPv6 is opt in so after getting your connection you will have to contact them, they will then assign you a /48 and enable IPv6 on your connection.

I had the unfortunate issue where a change at Zen disabled my IPv6 connectivity. I spent ages debugging, then emailed, and they had to reactivate it.

I chose my ISP for much the same reason (idnet), well the combination of IPv6, static IPv4, and not being one of the big four.

(And it's always entertaining to ask the folk trying to sell BT/Talktalk/Sky/Virgin broadband deals on the street about IPv6 for the utterly blank looks that you get).

The fixed IPv4 was a key matter when I signed up. Particularly that they offered /29s, though that is less important now that SNI is almost universally supported and due to physical line issues over the last year or few (and wanting >17Mbps upstream) I've moved most of the public bits I hosted (literally) in-house to external locations.

The question of IPv6 and fixed IPv4 is fun to raise when sales robots talk about matching other ISP's offerings. The irritating one is when they say "I'm sure we can..." and persist when I say "I know for a fact your consumer product range does not offer that".

I once asked a Virgin Media sales-droid about IPv6 on a leased line, and was told they could give us IPv6 if we handed back our IPv4 addressing... somewhat special.