Here are some randomly selected joke topics
Computers
"Virtual" means never knowing where your next byte is coming from.
Arrows
What did they say to King Harold at the battle of Hastings?
Cor! Get an eyeful of those arrows!
Pigs
Where does a woodsman keep his pigs?
In a hog cabin.
Holidays
What is grey, has four legs and a trunk?
A mouse going on holiday.
Hot Weather
Bill: Does this hot weather disagree with your mother?
Fred: It wouldn't dare!
Bicycles
Did you hear about the bicycle that went around attacking people?
It was a vicious cycle.
Work
Julie: It takes me an hour to get to work in the morning.
Jean: Is that before or after you arrive?
Be Seeing You
Knock, knock.
Who's there?
Al.
Al who?
Al be seeing you.
Birthdays
How many birthdays does the average man have?
Only one. When he was born.