You should never ever skip the base coat when doing nails. It is a vital step, it helps protect the nail. If you skip this step regularly your nails can go a horrible yellow colour and they become very thin and brittle.
I usually use the ones from Technic and LM but I came across some cheaper alternatives closer to home, in Primark. For £1-1.50 for a 10ml bottle thats amazing, and it means I don’t have to order them online and pay p&p.
They both dry super quick and protect the nail and polish. I love that they both have fairly large flatter brushes so you only need one spread on the nail and its done. An amazing product which I definitely recommend!