Earlier this week, E.ON said it did not expect to have to raise prices in the next 18 months "as a result of social or environment obligations".
But E.ON also warned, "There remains a risk, however, that increases in network charges or wholesale energy costs for example could force a price increase".
The announcement followed the Government's shake-up of green levies on Monday.
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The rapper failed to make it to London in time as he had problems with his passport.
The Home Office was offered the help of specialist social workers in August but rejected it, it has been claimed.
Sunday will be largely dry with some bright spells of sunshine after any mist or fog lifts and clears.