Yellow flowered shrub

I thought this was Dipelta, but seemingly that is pink. It is a suckering 2 metre tall deciduous shrub, Any ideas? TIA

 

Looks like the understated & under-rated, Diervilla sessilifolia

 

Exactly. Ta!
Been off line since asking.

 

That is a nice shrub Palustris - I had never heard of it before. Is it easy from seed?

 

Does not seem to set seed and the suckers do not seem to want to survive away from the mother plant either. Nice looking but it is a thug!