Discharge of planning conditions - what represents a "written request" - Public forum - Planning Advisory Service (PAS)

I'm having a debate with an LPA about whether a submission made to discharge planning conditions (all on the same application) should attract more than one £85 fee. The application was made under the cover of one letter and sought discharge of two conditions. I enclosed a set of forms for each condition (as I wanted to ensure that the LPA would be able to discharge one condition without being held up by delays on the other). The LPA is stating that, becuase there are two seperate forms, it comprises two "written requests". On the basis of the above, does the fact that the request to discharge the conditions was made under cover of the same letter mean that they both fall under the same "written request" and attract one fee, or is it based on whether the LPA will deal with the conditions as seperate admin processes for determination? Circular 04/2008 (Planning-related fees), para 124, does not confirm. I have seen reference to advice coming from Alan Cornock at DCLG, confirming that the fee chargeable by the authority is £85 “per request” (so only one fee can be charged if multiple conditions are submitted at the same time. If they are submitted at different times then a fresh fee can be charged each time). But this equally doesn’t provide a definitive position. If the Council is right and I vary the submission so that it is made under one set of forms, is there any way to avoid delays in relation to one condition impacting on the release of approvals for the other conditions?