You might have thought that the first decimal coins in the UK were the 5p or 10p coins (which were, of course equvalent to the old shilling and florin, respectively) introduced in anticipation of ‘decimal day’ in 1971. However a victorian florin was produced in 1846, which bore the phrase ‘one tenth of a pound’.
“-Dr. Bowring moved that the adoption of a decimal system of coinage currency and account would be a great public convenience, and that an address be presented to her Majesty, requesting the value of two shillings, being a tenth of a pound, and twopence two-fifths, being the hundreth part of a pound – such coins to be called Queens and Victorias, or any other name which to her Majesty seemed best. – Mr. Hume supported the motion. – The Chancellor of the Exchequer thought the prejudices of the People in favour of the currency to which they had been accustomed were too strong to introduce with effect all the changes proposed by the Hon. Gentleman. He had no objection, however, to striking ooff a two-shillling piece, which might accustom the public to the gradual introduction of the system proposed, by familiarising them to the use of one coin representing a decimal fraction of a pound sterling. He saw no necessity for an address to her Majesty on the subject, and would feel it incumbent on him, if the motion was pressed, to move the previous question. – Mr. Stafford O’Brien congratulated Dr. Bowring on the parial success whch was likely to attend his wefforts – Mr. Sheil thought that the system proposed could be gradually and advantageously adopted, and that the difficulties in the way could soon be oversome. – Sir G. Clerk feared that the issue of a two-shilling piece might give rise to frauds, from the close resemblance which it must necessarily bear to the half-crown – Dr. Bowring, after what had fallen from the Chancellor of the Exchequer, withdrew his motion, satisfied that the Government would soon take the matter entirely into its own hands, when it would find itself well sustained by the good sense of the country.”
The Stamford Mercury, 30th April, 1847.

