Tyre Deformation

[stevierst]

I'm wondering if its worth keeping the BT023 in case of "emergency" as although its not perfect, its still perfectly road legal

Na, bin it! Not worth keeping.

[AllyBally]

I had a similar problem with tyres on my Divvy after each winter, more noticeable on the rear where it was squaring off, and the front would have more tread on the r/h side and could feel difference by hand and see it.
  All I did was get the bike leaned over more on corners on the drier/ warm days commuting, soon got the tyres back into shape.
  But I wouldn't lee it for a spare as you've got new one on way

[Dead Eye]

Typical after buying the new tyre that the old one would suddenly start behaving...

Got out today for a play in Middle Earth on the ride out and had no issues at all with any handling for the entire day. All 280~ miles felt perfectly stable... I checked the tyre over and the raised profile doesn't see as pronounced as it was... maybe it really was just uneven wear on the tyre - I had been consciously leaning the bit a little after nick crips mentioned this to me when we met early in the day. I guess the roads in the west country are a little lop sided

I'll take it for a spin next week before I make a decision on swapping the front tyre - no harm in leaving the T30 off for now if the current tyre behaves itself