Firstly, apologies for all the cut and paste rules. Secondly, another example of poorly worded regulations which cause confusion and a variety of understandings.
For my 2 cents....I have included what
I see as relevant rules below and highlighted the appropriate sections for the original example given (DAY IFR with IAP available with no TAF (ignoring the NAVAID section)).
AIP ENR 1.1 57.1.3
When an aerodrome forecast is not available or provisional, the PIC must make provision for a suitable alternate that has a firm forecast.
AIP ENR 1.1 57.2.9
For IFR Flights, the alternate minima are as follows:
a) For aerodromes with an instrument approach procedure, the alternate minima published on the chart.
b) For aerodromes with an instrument approach procedure where an aerodrome forecast is unavailable or provisional, the PIC must make provision for a suitable alternate.
c) For aerodromes without an instrument approach procedure, the alternate minima is the lowest safe altitude for the final route segment plus 500ft and a visibility of 8km.
Enr 1.10
1.2.1
A forecast must be either a flight forecast or an area forecast with an aerodrome forecast for the destination and, when required, the alternate aerodrome. For a flight to a destination for which a pre-scribed instrument approach procedure does not exist, the mini-mum requirement is an Area Forecast.
1.2.2 For flights for which a forecast is required and cannot be obtained, the flight is permitted to depart provided the pilot is satisfied that the weather at the departure point will permit the safe return of the flight within one hour of departure. The flight is permitted to con-tinue provided a suitable forecast is obtained for the intended des-tination within 30 minutes after departure.
1.2.3
For flights to a destination for which a aerodrome forecast is required and cannot be obtained or is “provisional”, the flight is permitted to depart provided an alternate aerodrome meeting all the requirements specified in ENR 1.1 Section 58. is provided.
Summary..
It seems pretty clear from the 4 highlighted sections that in the example given an alternate must be planned for to depart legally.
To use
FGD135's logic argument. Logically if you don't know what the weather is going to be at the aerodrome you are intending to land at then you plan to carry enough fuel to go to an alternate where you know what the wether is.
FGD135 says
So, this means that VFR flights, in the middle of the day, with perfect weather, must always be carrying alternate fuel to an aerodrome that has a TAF!!
The rule that this qoute is trying to dispell is not just for VFR but for IFR as well which is why it is broken down further as listed above.