Email from Starling today mentions the features they are working on. 3 new features.
https://updates.starlingbank.com/4Q2Y-DS3B-3FB1726EC6B77714GKUQ2775CE3AD03CD3C57/cr.aspx?v=1
Of those three it would have to be online banking. They already have it for business accounts I believe.
Edit - shame they ran the poll on Twitter instead of email and a link to the website to vote.