Originally Posted by Lucanesque

Thanks for all the responses. So in summary: Fine to check in as hold baggage, may get stopped at the UK border to explain and/or pay some duty.

I think this is a risk I am willing to take for some superb maple syrup. Expect a follow up post in 4 weeks time with a tale of woe about how I was stopped at the border and questioned for six hours over my blatant attempt to smuggle said syrup.