During the 'Informal Consultation' period required by DAP in the airspace change process, all the above comments HAVE to be addressed by Peel; if they're not, DAP will merely chuck the application back and say try again.
Any establishment of regulated airspace requires the operating authority to make provision for access to other users eg transits from Sheffield to Sandtoft, plus Sandtoft MUST be allowed free operation within their own ATZ, and allowed access to/from that ATZ to the surrounding class G airspace. Peel must also supply statistics regarding transits, incidents etc. to 'make their case'. Believe me I've done it and it's a long drawn out process taking at least 6 months, normally double that.