FreeBMD is a good free easy to use site. You can often find births deaths and marriages which fit in with what you know about the family which might help your research along a bit. Frrebmd is just an index though and you would need to buy the appropriate certificate to get full details.
Keep in mind that with an unusual surname you will always need to search for misspellings and misinterpretations. So for Penniall you might like to search for pen*l or pen*a*l (just a couple of examples and there will be other variations I'm sure).
You can give names of anyone who is no longer living if you would like some help, though it is much more fun to do it yourself.
Also keep in mind that the pay sites like Ancestry and FindMyPast give you a two week free trial, so if you take that up when you have plenty of free time, you might find you can make good progress. But remember to cancel before the trial ends or they will charge your credit card for an annual subscription. Both have occasional free access weekends which are worth looking out for.
