So I've called them. Spend tracker should be in Accounts, between the row of 'Pay my card .... Statements ... Manage... ' and the list of transactions. If you go to the app store and look at the previews, its shown on the second panel.
I deleted and re-downloaded the app - nada. That's really flummoxed the guy - he knew about the Spend Tracker and e=was confident of the location (per the app store picture).
Currently on hold ...
They've raised a ticket with the IT team. 3-5 days to investigate. We'll see!!
Can anyone see the Spend Tracker?