Natural speed but clearly, please.
An English accent world be great, thanks!
London is too huge to see everything.
You should spend more than 3 or 4 days and plan your trip.
There are so many tourists during holidays that you shouldn't go at that period.
London can be expensive so you should visit the free attractions like museums.
Dining out / eating in restaurant can be expensive too so you should buy from take-away or supermarkets.
To get around London faster and cheaper, you should buy an Oyster Card.