I'm a former MFL teacher and have done a lot of residential trips, here and abroad, so I know what the staff at my daughter's school are giving by taking Y5 to London for three days, especially right now.
I always give staff something nice, just for them to enjoy on the trip. Last time it was wine, crisps, dips and chocolate but that was a UK trip traveling by bus. This time they are going by train so I thought maybe a Costa voucher with enough on it for all staff to have a posh coffee and a bun. dH says this is impractical but I can see a scenario where the kids stop for a drink and sit down and one of the staff does a quick Costa run. All other ideas welcome. Thanks.