Ben's routine has essentially been the same for months - I really, really recommend set(ish) nap and very set bedtime at this age.
He does:
WU whenever, I'm not sure! Lies quietly until we get him up around 6.30-40, very occasionally will sleep in to 7 but rarely - usually if ill
Nap is 11.45/12 at nursery and we did almost the same for months at home - 12/12.30
(Lately it has moved later, often more like 1pm at home as he won't go earlier but that's very recent)
BT always 7pm - it has moved earlier perhaps 3 times due to (a) total nap refusal or (b) illness
Where you are I would set nap at 12-12.30 (within that window) and BT to 7pm and don't budge