In an earlier contribution to this discussion,
Tx2 wrote:

In article ,
thought we might be interested in the
following...

If your conservatory is exempt from building regs - which most are -
there *must* be a final exit door between the house and conservatory
so that they are thermally isolated.

What law, if any, is being broken if there isn't this arrangement?

I quote from the Building Control section of my local authority's website:

Conservatories
A conservatory is exempt from building regulations (but not necessarily
planning permission) as long as it is;
* Less than 30 square metres
* At ground level in a domestic property
* At least 50% of new walls are of a transparent or translucent material.
* At least 75% of the roof is of a transparent or translucent material.
* It must be separated from the habitable parts of the dwelling by external
quality windows / doors.
* Any glazing below 1500mm in height in doors or within 300mm of a door must
be toughened / laminated glass or polycarbonate.
* Any glazing below 800mm in height must be toughened / laminated glass or
polycarbonate.
* Any heating in the conservatory has it's own separate heating controls and
can be completely switched off / isolated when not required.

Take particular note of the 5th bullet point!
--
Cheers,
Roger
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