Homes, shops and restaurants in The Cut were without electricity all day on Wednesday.
The Tas restaurant was able to stay open thanks to a generator provided by UK Power Networks.
The power cut began at about 9am and at the time of writing supply was due to be restored by 8.30pm.
According to tweets from UK Power Networks, the power failure happened when a cable was cut by another utility company digging in the area.
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.
7,000+ locals read it every week. Can you afford to miss out?
Read the latest issue before signing up