Thanks for the insight guys. @Buddy I had already come to a similar conclusion. I have made that list of things but I can see it taking forever to sell; so much so that there is no point in doing so right now, I don't have that sort of time. I've sorted it a bit and decided that it makes sense to keep it. Maybe I shall find it in a few years' time and it'll be a conversation starter :)
(X is too worn to read)
UK
Two Shillings
1951, 1953, 1962, 1965, 1966x3
One Shilling
?x4, 1825, 1826, 18XX, 1920x5, 1921x2, 1922x2, 1923x4, 1926x2, 1927, 1928x2, 1929x2, 1932, 1945
One Florin
1849, 1887, 1920, 1921, 1922, 1923, 1929
Sixpence
1950, 1964, 1966
Three Pence
1883, 1901, 1934, 1943, 1955, 1956, 1963
Half Crown
1947, 1948, 1962
Half Penny
1904, lots of ~1970, lots of ~1960
One Penny
1920, 1948, 1964
Ten new Pence
1975x4
Farthing
1904
Australia
One Shilling
1911
France (Mostly modern - skipped a lot)
Cinq centimes
1834, 1853, 18X5 (all badly worn)
Ireland (modern, skipped)
Guernsey (modern, skipped)
Yugoslavia
10, 20, 50 Dinara, 1955xmany
1, 2, 5 Dinara, 1953
Egypt
Colombia
1 Decimo
1856
South Africa
2 1/2 Shillings
1893
India
Two Shillings
1948
1/2 Pice
1887
Sixpence
1945
Brazil
10 R
1869
Netherlands
10 Cent
1972
2 1/2 G
1969
East Africa
One Shilling
1948
Germany
1 Pfennig
1899
5 Pfennig
1950
10 Pfennig
1949
50 Pfennig
1949, 1950x2
1 Deutsche Mark
1950x3
USA
One Cent
1903
One Dime
1944, 1983
Austria
10 Groschen
1959x3, 1962, 1963x2, 1965x3, 1966
Greece
5 Drachmai
1976
South Africa
5c
1971
Canada
5c
1954, 1975
1c
1915
Italy
100 Lire
1966
10 Lire
1955
5 Lire
1953
New Zealand
50 Cents
1967
Switzerland
1/2 Franc
x4
5 Franc
x11
10 Franc
x5
20 Franc
1959
Spain (* is the number in the star)
Diez Cents
1941
50 Centimos
1949
1 Peseta
1947, 1966x4, 1975,
2.5 Pesetas
1953*19
5 Ptas
1957*65x2, 1957*XX,
25 Ptas
1957*59