If Peter says that it is not a False Widow it is not without any shadow of a doubt. (and I agree with him totally as well having looked at the picture) I have noticed that most internet posts about spiders away from this site are not well informed. Actually False Widows are extremely common. Everybody (and I mean everybody!) in the coastal counties of Southern England has had lots of them in their house and garden for years. They are one of our commonest southern spiders. The fact that harm caused by them is very rare should tell you something about how dangerous they really are. Cars are really much more dangerous! So is Electricity. So is walking along the pavement (beware of those small irregularities!) Hot water is also really dangerous. Tea etc. Eating food can also result in choking so be careful of that. One of the worst dangers is people. Touching them or even breathing air near to them is risky as they often carry a lot of potential person specific pathogenic viruses and bacteria.
Spiders? Not really a danger in comparison with the aforementioned. I wonder why it is that we lock on to certain things like spiders to react fearfully to. However fear of spiders is no reason not to join the BAS! I know for a fact that at least one member who is the author of a recent substantial book on spiders no less, is really quite frightened of the big ones in the bath and also let out a scared yelp on a field trip recently when he walked through a large autumn orb web that covered his face. ...... and actually I am a bit scared of certain big fast ones! I would not tickle the web of a adult Segestria florentina with my finger for example. .....A good idea for an initiation ceremony for new BAS members perhaps?