Website:
www.spicers.netThe
contact page direct numbers for various staff members of various departments. Most appear to be 01223 822xxx, so it's probably their direct dialling in (DDI) prefix. If the support is operated by themselves from that office, then I would assume that the 0870 points to one or more of the DDI numbers.
If the 0870 number answers with an automatic voicemail service when they are closed, and they haven't recorded a specific message, it may answer with the extension number. For example it may say "Extension 543 is unavailable, please leave a message..." You can then dial 01223 822
543 to check that you get the same message.
You can then try the number during the daytime, and if it works, come back here and tell us what you've found.
If there is no extension number given on the 0870 but it does answer with voicemail, then you could dial through 01223 822xxx numbers to find it. I would do this out of hours and withhold your number.