  Motivated by the principle of natural flavour conservation, searches for
signatures of a second scalar doublet at the LHC are usually limited to models
with a very restricted Yukawa structure. Strong correlations between the scalar
couplings to fermions are fixed in these models due to the underlying flavour
principle, making the results obtained from such analyses highly model
dependent. Moreover, constraints derived from flavour experiments also vary
radically within the different models considered. The hypothesis of Yukawa
alignment provides a suitable framework to perform a more general analysis of
125 GeV boson data and searches for additional scalars at the LHC, allowing for
sizable new physics effects to be observed in the scalar sector while
accommodating the stringent limits from flavour experiments at the same time.
This general setting includes the different models with natural flavour
conservation as particular cases.
