For me, DH, and 7 and 9 year old DCs in August.
Attracted by trains, walking, lakes, moderate weather and the fact that it's very public transport friendly, but would we actually enjoy it? What would we do all day? Is it eyewateringly expensive? (we can afford it, and we're used to London prices but I think it takes the fun out of a holiday if you're always reeling in shock from 10 pound cups of coffee).
Alternatively, does anyone have views on Italy with that age group? (cities or the Lakes).