Yakov wrote:

Specifically, I'm interested in amps rating for 2x1.5 sq.mm. and
2x2.5 sq.mm (220V). I tried to google no luck so far.

For flexible cords you need Table 4H3A of BS 7671.

2x or 3x 1.5 mm^2 - 16 amps (single-phase AC)
2x or 3x 2.5 mm^2 - 25 amps (ditto)

--
Andy