I would reccomend NOT using the financial advisor linked to the developer and also avoid using any reccommended solicitor.
I think that there is a conflict of interest in these relationships, and I personally don't like the hard sell type approach when these reccomendations are made.
Just tell them you already have an IFA that you have known for a long time, and have already got things moving.
If a developer too strongly pushes the use of a FA it is likely that there is some commision that would be fed back to the developers, and I'd consider walking away.
It is just bully boy tactics.
Good luck with it.
Sparky.