Sally Hansen Insta-Grip Fast Dry Base Coat is the best base coat I have ever used. Hardly any drying time, dries completely in under a minute. Gives an amazingly smooth base to nail polishes, prevents staining and has helped my nails to become grow through thick and strong. Helps nail varnish last much longer. Does everything a base coat needs and more, have nothing negative to say about this product. I bought this for £3.58 on Amazon, would recommend that anyone who wants a flawless mani should buy this.
I have used a lot of topcoats before but Rimmel Finishing Touch Ultra Shine Top Coat is the best I have used. It claims to be chip resistant for 10 days. I kept it on for 10 days but I did top up in between after doing a big clean around the house, Im sure it would have stayed on nonetheless. It has an amazing shine and it almost totally chip resistant. One negative would be that it takes 45mins-1 hour to completely, fully harden. Not good for people in a rush! Although, still my fave top coat I’ve ever used. 
Pippa's Nails 