Insulation on low heating buildings (England)

In the english building regulations, part L2 clause 0.22 allows no insulation for low or no heating situations. If we heat the building to 16deg C the load will be greater than 25w/m2. Exists another regulations for this situation? Otherwise we must increase the insulation in dimensions that i mean is not nececery for a low heating building.
bye jiannis

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