crossflow

Hi, I'm new here. We're redoing our bathroom and would like to join toilet waste on one side of a branch, and a conjoined bath and basin on the other side. The regs say this is iffy with a non-swept junction. Would a swept junction like this work if we put a 50mm to 110m offset adapter like...

I am adding a new bathroom on the first floor of my house and there is limited space to run the drains to the existing soil stack. I have bought a branch connector for the soil pipe (see link) and was hoping to be able to join the shower and basin drain into one of the 40mm side bosses but have...