Thanks again for the advice.
I Googled my Medic - he specialises in oral & maxillofacial surgery. I found a document for the startegy for treatment of oral cancer in my area, and his name was top of the list of experts.
They hold what they call MDT meetings to discuss and agree treatment with representatives from Surgery, Radiotherapy, Chemotherapy and Palliative & Supportive care.
I suspect I won't get better treatment without moving house.
I'm getting my treatment free on the NHS, but I also looked up who does the private treatment, and it was the same person.
I'll ask him about depth of penetration and differentiation, and about neck scans on Monday.
I understand I'll be having monthly check-ups.
Thanks again. This is a big help :-)

1990s: Oral Lichen Planus
Feb 2013: Persistent lateral tongue lesion
Jul 2013: Biopsy
Aug 2013: Diagnosis - T1N0SCC
Sep 10: Laser surgery to remove 1cm lesion with 1cm margin and biopsy of smaller second lesion further back
Sep 23: Tumour confirmed poorly differentiated & aggressive. Scans pending.