Are there any ways in which I can improve the loading speed of a website?
I know that Google is really pushing loading speeds and with the popularity of mobile websites it's now imperative that sites load quickly.
I strongly recommend using either Google's or Yahoo's page speed add-ons to test out your pages. It's fast and easy to do and offers clear guidance on how to improve your page speeds.
As recommended by Nick in the comments here are some more good resources and information:
Here's come good stats that shows why page speed is important (source)
Try CloudFlare http://www.cloudflare.com/plans
CloudFlare is a content delivery network and distributed domain name server service marketed as improving website performance and speed and providing security.