I'm hoping someone can help out: my bil's family lives in Belgium, and my pil's are planning a trip out there to look after the girls (7 and 4) while their parents travel (work related). As pil's have already been over and visited the area earlier this year, they were thinking this time round to take the girls over to England for a couple of days. Does anyone know what sort of documentation the girls would need from their parents/local gov to authorize this?