change from Premier Option 1 to PlusNet Extra

[#1]

Seriously thinking about changing product to reduce my monthly payments. I think I'll be OK with regard to usage volume and usage patterns. My billing date is the 29th of the month, so if I elect to change would it only come into effect on the next billing date ?

[#2]

Yep, all product changes are done on next billing date. Otherwise there's a reasonable chance your billing having a 'hiccup'