There are two main ways of purchasing certificates from abroad if sterling cheques aren't an easy option.
The first is direct from the General Register Office at Southport, who take credit cards (Visa, Mastercard). See
General Register Office (GRO)
That way it'll cost GBP 11 if you have the approximate date, GBP 8 if you have the exact reference. There is currently a backlog of about 8 weeks, though.
If you are near an LDS centre they are likely to have the indexes to births, marriages & deaths on microfiche, from which you will be able to get the exact reference.
England and Wales Birth, Marriage, and Death Certificate Information Barbara Dixon
Registration Districts 1837-1930 England and Wales (1837-1930) GENUKI
Registration Districts - Present day GENUKI
Joy Murrin PO. Box 278, Oatley, NSW 2223- Birth, Death & Marriage Certificates for England and Wales from 1st July 1837. Pay in Australian dollars!
British Counties, Parishes, etc. for Genealogists, explanations of such things as the distinction between county and shire, the meaning of Poor Law Union, or the definition of some area such as West Country or Black Country - James Fisher's page
County - Berkshire
My Berkshire page
County - Lancashire
My Liverpool page
County - Middlesex
Greenwood's 1827 Map of London
Postcode District Map of London
Dickens' London Map
Steeljampage covering the churches in the City of London. The page includes a map of the City which the churches marked which can be used to link to the details. Some churches have a fuller description and some have pictures. I will be updating the site regulary. I am on the lookout for pictures of the churches.
Parishes of Middlesex
County - Oxfordshire
My Oxfordshire page
Emery Papers A-Z of British Genealogical Research
UK Libraries on the web
England Look-up Exchange
Multimedia Mapping have copyright, require you to link to a map
UK Street Maps
Ordnance Survey - Gazetteer of Place Names You may search the database to find a place name of your choice - the search will return the name of the place, its County, a 4 figure Ordnance Survey grid reference (tile reference [SZ, TQ etc.], plus 4 digits within the 100Km square) and the number of the 1:50 000 Landranger series map that the place appears on. For purchase
The Olde Map Company County Maps of Elizabethan Britain for purchase
Parish Locator GENUKI The parish database is a database of the geographic location of churches, registration districts etc in the UK, with details of their founding and closing dates. Do not regard it as a primary source, as many churches are missing and information about each is being developed. So use it as a guideline to churches in a particular area at a point in time, but consult other references for exact details.