Siting of structure adjacent to Gyllyngvase Tennis Courts

This planning application by St Michael's Hotel has taken us sometime to catch our breath over this audacious attempt to site a "temporary" structure for up to 3 years alongside the tennis courts. The Design & Access Statement (click here) suggests this (structure) is a modest one no more than 9.3 metres x 3 metres x 3 metres. That is a massive 300 square feet something like 50% bigger than a standard shipping container. And it comes with decking, a septic tank to be emptied regularly by tanker. Its purpose?  to provide welfare space, storage and training facilities for Tennis Court users.  

Why is the application for 3 years only?    With no explanation for this time limitation it should be assumed that at the end of 3 years a further application will be submitted.
Why are the facilities needed?  Within a few yards there are adequate and abundant facilities at St Michaels. 
Will the facility be used solely for tennis related activities.
Will the facility be available to the general public, not just St Michaels hotel guests and leisure club members. (The use of the courts by the general public has declined drastically under St Michaels tenure. Pricing is exorbitant and the facility is operated as if it is for the exclusive use of hotel guests and club members)
Why is the above ground sewerage tank, mentioned in the D&A statement, not shown on the drawings?
Why are there no visual representations to show the design and finishes of the container building together with its impact on its surroundings?
Placing a large steel shipping container (if that is what it be) in a sensitive region of a Conservation Area would require a compelling justification.  There is none.  The adjacent St Michaels Resort has more than ample facilities.
The development is contrary to the National Planning Policy Framework which requires schemes in conservation areas to enhance or at least not detract from the surrounding environment.
The proposal contravenes Falmouth Neighbourhood Plan policies FOS.1  Protection of Open Spaces and Policy DG7 Design in the Conservation Area
The application is missing essential detail to show the impact of the building on the surroundings.  There is no Landscape and Visual Impact Assessment, as required by planning guidelines.
Any investment in the site should be used to re-establish the courts as a public facility and reverse the severe decline in public use under St Michael’s management

The lease held by St Michaels is, we understand, to be used for the purpose of tennis and at rates commensurate with other public amenities of a tennis nature operated directly by Cornwall Council. This is not the case as the prices being charged are much higher (unless you happen to be a guest of the hotel when it appears to be free). The D & A statement comments that the lease is a repairing one which begs the question why no repair works have been done until very recently.
There is no doubt that a featureless steel shipping container, or its equivalent, will have a negative impact on the surrounding scenery and conservation area. To justify such harm would require the proposal to offer significant benefits to the town, its residents and the broader community. No such benefits have been identified.  Only the narrow interests of a single commercial enterprise will be served by approving the application.  Therefore, it must be refused.