thus charles and anne was not offically created prince / princess, but would enjoy the style...... etc, as tough they where prince and princess.
sounds very much like what i meant by honorary prince / princess to me.
No, they were born HRH Prince Charles and HRH Princess Anne because that's what the 1948 Letters Patent stated. Otherwise, under the 1917 Letters Patent of George V, they would have been styled as the children of a Duke as female-line grandchildren do not take the status of HRH, but from their father instead.
For example, Princess Anne married Mr. Mark Phillips and had two children. Mark declined to accept a peerage from The Queen, so his children are Mr. Peter Phillips and Ms. Zara Phillips as female-line grandchildren of The Sovereign. If Anne had been heiress presumptive and The Queen had no sons, she also would have likely issued letters patent stating they were HRH Prince/Princess of the UK as the spares.
In fact, it was reported The Queen did offer to issue letters patent elevating Peter and Zara to HRH Prince/Princess of the UK as the rest of her grandchildren (as male-line descendants) would be so entitled. Anne declined the offer, desiring a more normal upbringing for her children without the burden of being HRH.
To confuse the matter even further, HRH The Earl of Wessex's children are not styled HRH Prince/Princess of the UK, even though under the 1917 Letters Patent, they are automatically entitled to it. Instead, they are being styled as the children of a Peer (James, Viscount Severn and The Lady Louise Windsor), rather than HRH Prince James of Wessex and HRH Princess Louise of Wessex.