  We consider the case of a chiral soliton lattice subjected to uniaxial
elastic strain applied perpendicular to the chiral axis and derive through
analytical modelling the phase diagram of magnetic states supported in the
presence of an external magnetic field. The strain induced anisotropies give
rise to three distinct non-trivial spin textures, depending on the nature of
the strain, and we show how these states may be identified by their signatures
in Lorentz transmission electron microscopy (TEM). Experimental TEM
measurements of the Fresnel contrast in a strained sample of the prototypical
monoaxial chrial helimagnet CrNb$_3$S$_6$ are reported and compare well with
the modelled contrast. Our results demonstrate an additional degree of freedom
that may be used to tailor the magnetic properties of helimagnets for
fundamental research and applications in the areas of spintronics and the
emerging field of strain manipulated spintronics.
