Offshore Banking Question [UK Guys Prob Will Know]

Isle or Man or Jersey, Channel Islands

Are these classed as offshore?

Does anyone bank over there also with hsbc or the likes?
Let me know. Also whether they are taxman safe.

guys, just found a nice list of offshore places, may come of use:-

Alderney
Andorra
Anguilla
Anjouan
Antigua
Aruba
Bahamas
Bahrain
Barbados
Belize
Bermuda
Botswana
Brit. Virgin Isl.
Brunei
Cayman Isl.
Cook Islands
Costa Rica
Curacao
Cyprus
Dominica
Dom. Republic
Dubai
Gibraltar
Grenada
Guernsey
Hong Kong
Ireland
Isle of Man
Jebel Ali
Jersey
Labuan
Liberia
Liechtenstein
Luxembourg
Macao
Madeira
Malta
Marshall Isl.
Mauritius
Monaco
Montenegro
Nauru
Nevis
Niue
Panama
San Marino
Sark
Seychelles
Singapore
Switzerland
St. Kitts
St. Lucia
St. Vincent
Turks & Caicos
USA, Delaware
USA, Nevada
USA, Wyoming
Vanuatu

what is offshore? what is the benefits? please someone explain...

Main reason, Tax Excempt mate