I only ask because the instructions say "clearly written in block letters in black or blue ink". Completing the form by hand doesn't really work for me because my handwriting is terrible, even in block capitals. My wife's is not much better.

Presumably, they just need the information to be clear, so I would imagine it will always be clearer if typed in block capitals rather than handwritten - but I'd rather be sure before I send it off.
Regards