I think that if you are not sure for how long you would stay in the Netherlands it would be a bad idea to send them to a local school.
I have taught in UK primary schools and now teach in a Dutch primary. The systems are as different as can be. If your kids enter primary school at a Dutch school and then have to move into the UK system in say 3 years time, then they will be absolutely miles behind.
The Dutch system moves very very slowly. Fine for below average children, do-able for average children and extremely non-challenging for above average children. The Dutch system doesn't stream, they have so called 'plus' classes but they really are a sweetener to tell parents that they are doing something, but are just a joke compared with the UK.
In the UK you expect average or above average children to have good reading skills by age 7, in the Netherlands they are still reading basic books, practising writing letters, doing number bonds up to 20! (in the UK they are practising times tables by now, eg year 3 curriculum). Dutch biology and history during the first few years of basisschool are nursery type stuff if you compare with the UK.
The Dutch system used to be good, but that was quite a while ago - they are now sliding down in the PISA league tables, whilst the UK is steadily climbing.
I also find that in Dutch basis schools discipline is a major issue, probably similar to UK sink schools in the worst areas in big cities. A significant part of kids have no respect for the teacher, don't listen, disrupt the whole class, with the whole class paying the price.
So, if you want to be able to return to the UK, I would like to strongly advice to look for a school which follows the UK curriculum.