Ok I was wrong about the over weight as the rules have now changed.
I mailed the Trading Standards and this is the reply:
Many thanks for your enquiry. Following my voicemail today, here is a more detailed response:-
The Regulations concerning the sale of jarred honey only really apply to packers or importers. However, there has been a fundamental change in legislation during recent years, in that "Prescribed Quantities" have been removed for almost all products.
Example: it used to be the case that a 454g (1lb) jar of honey was permitted to be sold, but a 500g jar was not, as 500g was not a prescribed quantity. (Of course, if a jar actually contained 500g of honey, but was labelled as 454g, there was no offence.)
Nowadays, therefore, honey may be sold in just about any quantity (by weight), but the jars must be labelled correctly. Goods which are made up in packages (or jars) to a constant amount - known as the "Nominal Quantity" - are controlled by the Weights and Measures (Packaged Goods) Regulations 2006. These Regulations lay down rules for packers and importers, such that the average quantity (per batch) of a package must be at least the stated nominal quantity. Packages containing less than the nominal quantity are permitted, down to a defined level (the "Tolerable Negative Error"), as long as the average remains sufficiently high. There are no regulations concerning packages which exceed the nominal quantity.
So, to answer your question, it is certainly not legally as bad to be overweight as to be underweight, and from a customer's viewpoint it is beneficial. From the packer's perspective, however, excessive product "giveaway" is not good business practice, and may be a cause for concern to Trading Standards officers (as it could indicate poor product control in the packing process, and thus an elevated risk of deficient packages being created).
If you are involved solely in selling jars of honey, the only realistic offences would be knowingly offering for sale deficient packages or packages from a failed batch. However, in most cases, it is highly unlikely that the retailer would have (or be expected to have) that information.
I hope that this covers all aspects of your query but, of course, if you have any further questions, please don't hesitate to get back to me.
Kind regards,
John.
John Pritchard, Trading Standards Officer
Trading Standards Service
Leicestershire County Council
County Hall
Glenfield
Leics.
PH