I remember thinking, this is probably the last time I will do this, however while T1 is scheduled to close (presumably sometime in the next 12 months) I assume that that the aircraft stands/Gates etc will remain even if the access is changed.
I haven't seen any definite announcement yet re the date that T1 will finally close, but clearly the apron space, minus the piers, will be used as remote stands otherwise there won't be enough stands available at peak times.
In due course the new T2 will expand northwards, in two phases, but the first of those isn't due to open until around 2030.