  The chirality and helicity of linearly polarised Laguerre-Gaussian (LG) beams
are examined. Such a type of light possesses a substantial longitudinal field
when its beam waist is sufficiently small and so gives rise to non-zero
chirality and helicity. In the simplest case of a doughnut beam of winding
number $\ell=1$ and another identical to it but has $\ell= -1$, we obtain
different chirality and helicity distributions at the focal plane $z=0$. We
also show that this chiral behaviour persists and the patterns evolve so that
on planes at $z<0$ and $z>0$ the beam convergence contributes differently to
the changes in the chirality and helicity distributions.
