Thanks Slowhands.
Apologies for wasting your time, I have just found this RCS site myself and was about to edit my post accordingly when I found yours, sorry. Perhaps appropriately my pc's been full of a virus lately and is still struggling !

It seems that contrary to my expectations which I thought were reasonable, it seems there is no "simple" searchable database of their members. Even their website is less than clear, eg

"1. we may not necessarily come up with much information unless the ancestor was a Fellow of the College (FRCS)
2. If your ancestor was solely a member (MRCS), it is unlikely that we will hold any detailed information. See clarification of the difference between 'MRCS' and 'FRCS' in a historical context"

I had assumed this statement would be followed by a link or somesuch to this clarification, probably within their website, but it seems not !??.

Anyhow, I guess there is a database, but not a public one. Either way in this instance it's irrelevant as clearly the RCS route isn't appropriate for Benjamin. It appears the RCS prefer to continue to charge individual research fees rather than signup their Archives to one of the big FH websites, which is fine. It's also good they indicate in advance they don't hold Members records, and don't charge excessive search fees either. However I still feel their website could be clearer, as shown by the rather more FH-friendly approach of their "equivalents" in Scotland.
http://www.library.rcsed.ac.uk/content/content.aspx?ID=10

This pdf booklet from the Royal College of Physicians gives many helpful links for those researching ancestors within Medicine; it also serves as a reminder that this complex area has many different facets each with their own proud traditions and histories.
http://www.rcplondon.ac.uk/sites/default/files/family_history_research_guide_1.pdf

Thanks anyhow S for helping with a search which is harder than I'd anticipated, and for adding the BT references too which are a great help.
If nowt else we never stop learning about interesting new things with this hobby, do we ?, which can't be bad and is often very good. I've just been reading about the continuing problems at the Westbury Practice, ridiculous in this day and age. I will write to them via the Newnham office but I suspect they've far more pressing matters to attend to.
http://www.newnham-westburysurgeries.nhs.uk/info.aspx?p=2

There may be more - my "guess" is that he has retired in the mid seventies, If one of his first appointments was to Westbury Institute in 1936, he was possible in his mid 20's so born 1910 ish , retires aged 60 something in the mid 1970's

This looks like Benjamin WRIGHTs predecessor at Hunt Hill; could well be "living" held by the WoS Guardians for their Medical Officer. Andrew RHATIGAN attends many Inquests between 1924 and 1935.

from GMC records in 1923

Andrew Thomas Rhatigan of Camlisk, Edgeworthstown,Co Longford Ireland

Name:Andrew T Rhatigan & Bertha P Williams
Date of Registration:Jan-Feb-Mar 1924
Registration District:Cardiff
Inferred County:Glamorgan
Volume Number:11a
Page Number:588

Name: Andrew Thos Rhatigan LRCP & S Irel & LM Surgeon and Medical Officer
& public vaccinator No 1 district Westbury on Severn Guardians Committee and medical Officer
to the Institution , Hunt Hill, T N Westbury 4
Region:Gloucestershire
Residence Year:1935
Publication Title:1935 Kelly's Directory of Gloucestershire

THE LONDON GAZETTE, 3 APRIL, 1936
RHATIGAN, Andrew Thomas, Hunt Hill, Westbury-
on-Severn, Gloucestershire. MEDICAL
PRACTITIONER.
Court—GLOUCESTER.
No. of Matter—10 of 1926.
Date of Order—March 5, 1936.
Nature of Order made—Order for immediate
discharge.

THE LONDON GAZETTE, 17 DECEMBER, 1926
No. 4,170. RHATIGAN, Andrew Thomas, Hunt
Hill. Westbury-on-Severn, Gloucestershire.
Court—GLOUCESTER.
. Date of Filing Petition—Oct. 12, 1926.
No. of Matter—10 of 1926.
Date of Receiving Order—Dec. 13, 1926.
No. of Receiving Order—10.
Whether Debtor's or Creditor's Petition—
Creditor's.
Act of Bankruptcy proved in Creditor's Petition
—Section 1-1 <G.), Bankruptcy Act, 1914.

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Ἀριστοτέλης A Gloster Boy in the Forest of Dean ><((((*>

There may be more - my "guess" is that he has retired in the mid seventies, If one of his first appointments was to Westbury Institute in 1936, he was possible in his LATE 20's so born 1905 ish , retires aged 65 sometime in the mid 1970's

from GMC records 1935
Benjamin Wright of Newton Tony Rectory Salisbury, MRCS 1929 London
{newton tony
The Rector at the time ( may 1917) was the Rev Benjamin Wright- assume this is his father}

from GMC records 1951
Benjamin Wright of Hunt Hill Westbury on Severn MRCS 1929 London

1881 Church St (The Rectory)

Benjamin Wrightabt 1842Great Barr, Staffordshire, EnglandHeadDarlaston, Staffordshire
Emma Wrightabt 1846Highgate, Middlesex, EnglandWifeDarlaston, Staffordshire
Benjamin Wrightabt 1874Brownhill Batley, Yorkshire, EnglandSonDarlaston, Staffordshire
George A.A. Wrightabt 1877Brownhill Batley, Yorkshire, EnglandSonDarlaston, Staffordshire
Mary Wright abt 1878Brownhill Batley, Yorkshire, EnglandDaughterDarlaston, Staffordshire

1891
Benjamin Wright abt 1874 Birstall, Yorkshire, England Boarder Darlaston, Staffordshire

Name:Benjamin Wright
Date of Registration:Oct-Nov-Dec 1904
Registration District:Weymouth
Inferred County:Dorset
Volume:5a
Page:280

1911 12 Charlotte Road, Edgbaston, Birmingham
Benjamin Wright 37 Yorks Birstal Clerk in Holy Orders
Annie Wright 33 Salop Whitchurch
Emma Wright 65 Highgate MDX widow Mother
Benjamin Wright 6 Dorset Melcombe Regis
Kathleen Wright 4 Dorset Melcombe Regis
Richard Pearson Wright 2 Dorset Melcombe Regis

Name:Benjamin Wright
Birth Date:21 Nov 1904
Date of Registration:Mar 1993
Age at Death:88
Registration District:North Cotswolds
Inferred County:Gloucestershire
Register Number:14A
District and Subdistrict:4851
Entry number:127

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Ἀριστοτέλης A Gloster Boy in the Forest of Dean ><((((*>