It won't look smart (except in an existential way) and it won't look pretty, but on the bright side it won't cost you a penny either, as long as you have lots of unused or even unusable tat and of course a wild and free imagination. And if you're lucky (and I'm keeping my fingers crossed on this one) as an added bonus it may work! Time will tell, and yes, I will spill the beans on whether the tomatoes will ripen. So far they have spent two nights out under plastic and I have to say they are looking healthier than I would be after camping out at this time of year.
Ok lets get specific. Materials used - one sack-truck (seen better days and one wheel falling off), one large plastic sack (see-through, came as wrapping on something), three plant pots 6" to 8", two tomato plants grown to two feet high, one gherkin plant about a foot high so far.
No need for instructions - it's fairly self explanatory. Takes one plant to the back and two to the front. As an afterthought I put some trays under the pots, for ease of watering - removed the need to take the plastic sack off to water. The sack will need removing on a regular basis in the daytimes, for pollination, but it fits well and lifts off easily.