I've tried to find the answer to this online but I'm having no luck, so as theres plenty on here living in London I thought I'd ask.

Basically I move to Walthamstow soon and will be commuting to Mornington Crescent. Zone 3 to 2.

This involves me changing at Euston (Zone 1). Will I be able to use a Zone 3-2 pass or are TFL going to fuck me over because I'm changing at a zone 1 stop? Theres a £50 price difference monthly.

Cheers for any help.