The buy-to-let sector has been rocked by the possibility that Paragon, the leading buy-to-let loan specialist, may cease trading in its current form or be sold.In addition, rentals yields (rent as a percentage of a property’s value) have now fallen to an average of 5% in England, and higher interest rates are also eating into [...]

More: Problems mount for buy-to-let

when is it the right time to buy-to let?

When market conditions are right, I guess - which may not be the case at present.

i think its not the right time to buy to let.