Question: If anyone has anywhere they think would be suitable for investigation of chemical intolerance/allergy/anaphylactic shock, could they please let me know ASAP

Answer : Here are a couple of addresses that might be useful:

The British Allergy Foundation
St Bartholomews Hospital
West Smithfield
London EC1A 7BE

Food and Chemical Allergy Association
27 Ferringham Lane
Ferring, W. Sussex BN12 5NB

Action against Allergy
24-26 High St
Hampton Hill
Middlesex TW12 1PD

All charities so probably need to send s.a.e. to get information.