Protecting pension growth

Albermarle

London2023 said:

I wonder if some funds have the option of putting money into "cash" (ie retain it in the fund as cash).

As Linton says, some managed funds will keep cash from time to time as part of their strategy. However as you are investing you would not normally want your investments to have too much cash, as you are probably holding some cash your self separately.

NlghtOwl

Consider the bucket strategy for when you need to access the money. Low risk for 0-5 Yr, medium risk 5-10 yr, higher risk for +10 yr investments. Some money you won’t need to access for 20 years or even planning to leave to dependants so you might as well stay invested in equities or this money. 
Drawdown planning and minimising taxes is the point where financial advice may save more money than it costs. Good luck.