This is a weevil - a bit tricky to tell from the picture but my guess would be Anthonomus rubi. The 'spike' is the rostrum, an extension of the head and mouthparts which carries the jaws at its tip. Some poeple call these 'long-nosed beetles' but beetles don't actually have noses, they use their antennae for that!
Many thanks for your very helpful and speedy response. I'm sure you're right. I've looked up Anthonomus rubi in various places on the Internet, and it really does fit the bill. I'd very much like to know if they have a natural predator as it seems they create a lot of damage.