I had a punt with a lass, on the way had to stop for cash from the hole in the wall, but the usual one was out of order, so had to make a 5 mile detour. Text the lass to say would be a few mins late due to traffic, she understood - no issue.
After the punt we where talking and said that was late due to traffic as had to get to another cash machine, I only had £100 on me and she was £120. She said you should have said as I have seen you before would have done it for that.
So there you go, phone up just before punt, say cash machine out of action will be late as only have £ x amount - might work - might not
Next time she is in my area, will call and say only got the £100 or £110
I think as long as you don't appear to take the piss you won't get blocked