“Contrary to popular rumour, there is no Act of Parliament referring to King Charles spaniels being allowed anywhere in the Palace of Westminster. We are often asked this question and have thoroughly researched it. The House of Commons Information Office Factsheet G7 Some Traditions and Customs of the House states that ‘Dogs, except guide dogs, are not generally allowed in the Palace of Westminster.’ There is no evidence whatsoever, that spaniels have ever been officially exempt from this rule, and any dogs which have been resident in the palace with their owners were confined to private apartments, such as the Speaker’s or Lord Chancellor’s residences, and not permitted free run through the palace. Having said that, there is one recorded example of a dog, other than a guide dog being in the House of Commons chamber. On page 309 of the House of Commons Journal, in the entry for 14 May 1606. It states that ‘A strange spanyell of mouse-colour came into the House.‘”
From: http://www.dogjaunt.com/posts/king-charles-spaniels-and-the-myth-of-the-royal-decree/
Sorry Robert.