FWIW, the Brompton SAP (saddle adapter pin) installed facing forwards moves the seat closer yet, towards the handlebars
than is possible just putting the saddle clip ahead of the seat post, and pushing the seat forwards on it's rails ..

seems a straight bar in an M riser would be lower yet ,

I'm not sure how much the bend in the various riser types [M,P,S,H] differs for the reach . less bend would bring it back .. some.