DC1 is due in seven weeks (!) and I just got delivery of the pram/travel system.
There's holes in the pram liner for the harness to come through, but no holes in the pram mattress.
Is it usual to strap the baby in, even when they're in lie-flat pram mode? Should I cut some holes in the mattress to pull the harness straps through?
Or is the harness only for when they're sitting up in buggy mode?
My last experience of a pram is when I was in one 