Exchange Deposit Vs Mortgage Deposit

So part of the mortgage deposit is held as the exchange deposit?
They aren't 2 separate pots of money?

Question, If I buy a house now worth £200.000 for 30 years mortgage, over the years I will be paying a total of £350.000. If I'm selling my house after 5 years, I will be paying the total of interest + the amount of the house? If yes, basically I lose money

Hi Alex - I know you’re a mortgage advisor but I came a across two websites yesterday, wayhome and buy-by-renting…..are you able to do a video on these kind of schemes and how they differ from a traditional mortgage. Thanks

How does this work if you only have a 5% deposit?

But if you lose the exchange deposit, who keeps it? It's an awful lot of money!

And in any case, why on earth would exchange and completion not happen on the same day?