Yes as far as I am aware they are totally different issues

You should be able to achieve approval but with conditions which should be met before building work can commence.
Build over agreements and the party wall act are dealt with seperatly, the building control forms make you aware of these potential areas which will need to be assessed and carried out if needed before you start building.
如果你需要任何更多的信息我会的be happy to help.

Party Wall and Build Over are totally separate to Building Regulations

I would only add that both a BOA and a PWA should be in place before any work commences if appropriate

Build over Agreement is a matter that is dealt with by Thames Water, the solution provided/agreed might interfere with foundation works that are subject to Building Control inspection etc. Thus, inadvertently BOA (Build Over Agreement) will become part of BC Inspection. For the avoidance of doubt, it is a good practice to discuss/agree with BC Inspector the appropriate course of action.

The Party Wall Matter might also become a relevant aspect of the BC Inspection. For example, the original structural calcs/solution or structural element might be altered due to conditions stipulated in the Party Wall Award etc.

There is no one-answer-fits-all. Both BOA and Party Wall Matters are responsibilities of the Home Owner. However, the homeowner/builder/project manager/architect should make sure that these are co-ordinated and agreed with BC Inspector, prior to work commencement. This will save a great deal of time, waste of money and eliminate unnecessary abortive work. Ultimately, to obtain the Final Certificate, all work on-site has to comply with minimum requirements. The guidance on how to meet these basic standards are stipulated in Approved Documents (A – R). That is what BC Inspector is after.

If not careful, BOA and Party Wall Matters might, however, directly or in some cases indirectly hinder the overall project outcome.

Hi,
Building Control would need to know that you had dealt with any Building Over Sewer requirements because they normally manage the drainage inspections on site and would need to know if the Water Company had imposed any restrictions or even refused permission. I have had jobs where the drainage plans have shown sewers adjacent to the property and 6 meres deep. Building Control would have needed to be made aware of these before any work commenced on foundations. In ordinary circumstances your foundations would need to be taken to the invert level of any sewer and you would need to submit details of how you would bridge over them.
On the Party Wall issue the form is just bringing the legislation to your attention and Building Control have no involvement in it. There may or may not be a Party Wall issue with your project depending on how close it is or what impact it will have on the Party Wall. This includes using the wall for structural support, building astride the boundary and excavating for foundations within 3 metres of the neighbour's foundations and to a lower level.If this is the case and you haven't issued the correct notices your neighbour could get an injunction forcing you to stop work and employ a Party Wall Surveyor!
Building Control have an ethical responsibility to bring these issues to your attention to save you potential problems with your project. If you were carrying out the work yourself you might not be aware of these statutory requirements so they are actually being helpful.