Interior layout optimisation – hallway, bathroom +utility

I’m looking for an interior designer or architect to produce illustrative layout options for reconfiguring a hallway, bathroom and laundry/utility area in a UK residential property. The brief includes reducing the existing bathroom to create a bedroom-only en-suite, blocking up the current hallway door, and using the gained space to improve the laundry/utility with storage and a stacked washer/dryer. Please explore options for either a combined cloakroom WC + utility, or a separate cloakroom and utility. A secondary task is a concept sketch for sealing an unused double doorway internally and externally with finishes made good. Design and drawings only, not construction. I am looking for drawings that I can show a builder for the remodelling of the hallway, bathroom and utility/cloakroom in order to get the job costed and completed and drawings of the sealed and finished door for planning approval which show the finished look of the exterior. I can separately supply photos of the current internal space and external appearance if that is useful.
I have other drawing types, if they would be useful.