As a father of two boys (31 and 33) the eldest of which didn't speak to me for something like 12 yrs ...... I would just like to say to all of you who seem to dislike/have issues with dad .....
Send a card anyway .......... it may or may not make the difference but what's a couple of quid, when it might just change things.
I know quite a few people who have had "issues" and left it too late ..... and regretted their inaction after Pa has departed this world .... yeah, sometimes we (dads) are ****s but we are only human, with many failings, just like you .....
be bigger than them and make the effort .......................... please