I'd call it rather curious, and wonder what's behind that belief.
Home Office circular 031 / 2007 only mentions airsoft.
https://www.gov.uk/government/publications/the-violent-crime-reduction-act-2006-commencement-no-3-order-2007-firearms-measures
I always get twitchy reading that, as it's neither Act nor Regulation, it could vanish off of the interwebs at any point, or a court could simply decide not to find it persuasive given that it doesn't actually claim to be the direction of the relevant Secretary of State.
…. And of course all subject to interpretation in court.
A Home Office circular can always be removed and no longer be current, or replaced by different interpretation
In paintball we have two differing official interpretations:
1) Association of Chief Constables (or whatever it was called at the time) considered that every paintball gun they saw during a visit to a retailer was potentially a RIF. (This retailer didn’t sell bling speedball, but it did include black hopper fed paintball guns)
They took no action, but suggested that the retailer ‘do something’ in case they came back formally and went to court.
The company created their own membership scheme
Therefore you can argue that paintball guns are IFs or RIFs depending on whether then comply with VCRA colours
2) Home Office in response to the UKPSF held that in principle paintball guns are low powered air weapons and therefore not imitations, but with lots of caveats subject to court interpretation and also raised the option that if the VCRA was found to apply then UKPSF membership might be accepted as a defence.
The LPAW ‘exemption’ contradicted with airsoft guns as the newer firearms act definition exempting UK legal airsoft from firearms legislation didn’t exist.
Now that definition is there then there is a distinction to support LPAW non imitation.
All quite grey, and I’m always happy that offenders with dickhead activity get dealt with under other suitable legislation rather than ‘responsible’ players falling foul of a court day turning into a test case.
I don’t worry too much about legislative elements - it’s the rug being pulled out in circulars or court interpretations that are more likely to have an impact, which could be sudden