British Newspaper Archive for just one measly quid. Yep, £1 for a 1-month subscription.
To take up the offer, go to the subscription page, type in the Promotion Code SUMMER01, and hit 'Apply Code'. You'll see the regular price box change from £9.95 to £1. You can then register, if you haven't already done so, with just your name and email.
UPDATE: The full terms of this offer are not readily available on the site so please note: When the one month is up, your membership will automatically renew at the normal monthly price. It's simple enough to avoid this. Go to Account Settings and tick the appropriate box.
The offer needs to be taken up before Sunday 20 July.
The British Newspaper Archive includes a number of Irish newspaper including the Belfast News Letter and Freeman's Journal, and a number of other titles published in Dublin, Cork and Sligo.