Hi Jan
If the names I gave you do not tally, you do not know which regiment he served in, All information at Kew, covering this period, is in regimental order. And there were more than hundred regiments at this time.
The papers of men discharged before 1854 have been microfilmed, and the Friends of TNA (I believe) have provided an online index. Unfortunately there does not appear to a Joseph Pennington/Penington who was discharged about this time. You could check for other spellings -
http://www.nationalarchives.gov.uk/catalogue/search.asp. Enter “WO” (for War Office) for the Series Code. The closest is a James Pennington, born Lancashire, discharged 1815, aged 22. But I take it the baptism in 1790 is an assumption, or do you have other evidence that this is he? There are no Joesphs in WO97 (the service papers).
What does survive for most regiments are the Muster and Pay Books (WO12/WO16) which list all men serving. But you would have to go through them all to find a Joseph Pennington in the Huddersfield area in 1813/1814. However if he was in the Militia there are no surviving muster rolls.
Later in the 19th century men enlisted for 12 years. Firstly it was six years in uniform and six years in the reserve. This was later changed to seven + five. But I do not know if it was the same in the 1810s. Given the age on discharge he may have deserted.
Even if he did serve in Spain, he would not have received a Military General Service medal for this, as you had to be alive in the later 1840s when the medal was introduced.
Can you say where he was in 1815 and 1818; and where Harriet was living in 1841?
Neil…thanks for the look up of the 5th. Would it be easy to do a look up for any Pennington in the Waterloo Roll?
Ken