From the FCTM:
If selected speed is to be used to comply with ATC, the requested speed should be selected on the FCU. A speed below the manoeuvring speed of the present configuration may be selected provided it is above VLS.
I think this should be read that the ATC required speed can indeed be selected on the FCU, but that the aircraft flap position should respect the 'S' and 'F' speeds. - i.e. below 'S' speed, flap 2 should be selected.
I don't think the intention is ever to fly around in extended flight below 'S' speed with only Flap 1 selected. Not a good idea chaps.
Bit like flying around in a Boeing at VREF + 40 with flap 1, when the flaps should be at 5. It's not done.
As a separate discussion, regarding a go-around in flaps 1:
- It's the actual slats or flaps position that determines whether SRS is available.
Anything apart from clean will generate it.
- So the the thrust levers need to be in the TOGA detent with MAN TOGA annunciated before the wing is fully clean. Common sense would suggest making the "go-around flaps" call after MAN TOGA is annunciated .