Moving

Hello everyone! I am moving about 45 minute drive away. We have 1 fish tank (30 guppies and 14 cherry shrimps and 4 Amano shrimps). What is the best and cheapest way to transport fish to our new flat? Is it better to take all the substrate out and then start over? We have gravel and sand. What do we do with the decorations? & What about the heater and filter?

Edit: It’s also quite cold in the UK so I don’t want my fish to die.