Malton - Child friendly Pub / Restaurant

[mywifeshusband]

We're meeting relatives in Malton tomorrow for lunch. Where is good for 4 adults and 2 children (age 8 & 5). The 8 year old is mine and well behaved but their 5 year old can be a hooligan.
Need somewhere better than McD but not quite at the level of fine dining for powerfully built Directors. Also vegetarian to be considered.