Tesco is licensed in the UK, and so is covered by FSCS [1] (similar to US FDIC) up to £75k.
It's not so relevant here, but in the case that the bank became insolvent (very unlikely in this case), FSCS aims to pay out within 7 days, and will pay all claims within 20 days.
It's not so relevant here, but in the case that the bank became insolvent (very unlikely in this case), FSCS aims to pay out within 7 days, and will pay all claims within 20 days.
[1] http://www.fscs.org.uk/what-we-cover/