Rates will not be going up anytime soon, if anything I won't be surprised if they go down, look out for the next recession, the country is on the bones of its arse.
There has never been a better time to borrow if you want/need to. That said if you have any surplus cash sloshing around and you have a mortgage, the most efficient use of the dosh is to pay down your mortgage with it, (Offset Mortgages are great for this) don't waste your time saving if you have a mortgage. Just get a zero/low interest credit card for rainy day/emergency money and keep it in a sealed envelope - use the 'just-in-time' technique that industry uses rather than have cash sitting around doing nothing.