As there is currently 22 ALX200 darts in service and 21 new Enviro 200s arrived i think:
34608/9 will end up at Hartlepool replacing 2 of 33486/88/97 leaving 1 remaining ALX200 dart there.
34610-15 at Walkergate replacing all their darts
Possibly 35155-35160/87/88/89 to Slatyford replacing all their darts
35190 to Shields to replace 33492
Leaving 35161/2/3/72/3 at Sunderland so that 33101/484/829 can be withdrawn.