Working from home made my descent into decrepitude harder to avoid | Elizabeth Quinn

Confronted by my reflection at every turn, I armed myself with expensive beauty products

I have a theory - largely untested - that everyone is mentally stuck" at a certain age: the one that best reflects their outlook. Mine is 17. At my core, I see myself as youthful, enthusiastic and not yet tainted by the bitterness of experience. I'm optimistic and forward-looking. A woman in my prime.

But increasingly, the face and form I see reflected back in the mirror are none of those things. At first I blame harsh lighting for my transformation. Then I realise it's natural light coming in from the skylight, not the gentle artificial light of a boutique store change room. There is, quite simply, nowhere to hide.