nappyaddict - all the vol orgs connected with bf (NCT, LLL, BfN, ABM) have counsellors who may do home visits, but as they are all volunteers, do not cover the whole country and may have other calls on their time, it's a question of asking.
A phone call inititially would help - she may not need a visit.
ABM and BfN helplines both connect through one central number to the nearest person who is available at that time (provided you call from a landline and the number isn't hidden -the system uses the first part of your phone code to allocate you by location). This saves their volunteers publishing their home numbers with all the associated risks. The National Breastfeeding Helpline is run jointly by ABM and BFN. The number is 0300 100 0212. I think the national NCT breastfeeding line works in a similar way, or if not they will be able to put you in touch with the most local person.
As pp said, calling all the orgs will help you to locate who is active near to you.