Best answer by Mohammed
That makes sense, thanks for clarifying.
According to our Call Chargers & Add-Ons page:
084 & 087 numbers are classed as non-geographic numbers and are not included in your allowances.
Non-geographic special rate numbers (starting with 084, 087)iD Access Charge of 45p per min, plus a Service Charge*
03 numbers are perfectly fine as these are considered UK landline numbers like 01 & 02 numbers.
These will simply come out of your allowances like normal.