As long as we both know that this is "airfield operator's preference" rather than ATC clearance, it seems OK to me.
Well said,
Keef
Often do the same thing at home (EGLK/Info) - helps them, helps me. No problem
Edit: Forgot to say that I thought the FISO(s) at Duxford did a splendid job.
On first contact, he knew who we were, how many POB he expected and departure aerodrome - obviously he'd bothered to read the fax I sent. He even had time/inclination to explain to me that a C421 isn't an Aztec
When we paid he explained departure procs and couldn't have been more helpful.
On departure, the (different) FISO was as helpful as we could have wanted as well.