The article states some services I clouding the E1 E2 E6 and X34 may transfer to Sunderland. So possibly others and not just those mentioned. 

The spokesperson also states that they are looking at the possibility of transferring to other depots (possibly not just Sunderland)

Remember Gp North East closed South Shields depot back in 2003 and it has taken them a good 10 years plus to get settled in with services being operated out of Sunderland Washington and Gateshead instead. So it is highly likely many Stagecoach services could go the same way. 

Has Sunderland had its Number of Vehicles based at Sunderland increased with the traffic commissioner yet.  How many are they currently Licenced for and how many will the 20 or so extra take them to. 

20 to transfer E- has 15 of 27726-27740 and X34 has 4 of 19641-19644