Two toilets on same pipe run

[daunker]

I've read the building regs guidance about y junctions under buildings but I think this is where two horizontal runs connect and then not able to rod both. I am converting a building so wanted both bathrooms on the same run as only have to cut the slab once and go under cast founds.

 

Is this ok? I've searched here fairly extensively and think it is. Should I have used a Y and then 45 bend rather than a T (it's the right way round) for the second bathroom? Thanks!