Westpac is one bank making steady progress, while mostly ducking bad headlines, on a drive to close the doors on its most sedate and uneconomic branches.The number of branch closures by the bank may exceed 50 over the last two years, based on a scan of the grumpy detail shared by the Finance Sector Union with its members.The reason is always the same: the decline in over-the-counter transactions and an increase in customers accessing mobile and digital banking channels.Locations tend to be in the backblocks, though also in urban growth pockets and regional cities.