Rent to rent property investment

The property market in Uk is rising daily and the shortage of housing in Uk is increasingly high, a huge surge in immigration as thousands migrate to Uk for a better life and opportunity. This demand for housing has made it very difficult for housing as it is the most challenging thing for any immigrant who is just starting afresh or life in Uk especially London.

Does the rent to rent investment companies or agency actually bring back good returns? Or is it a market strategy to have people fund them for their gains?