Identification please of plant/flower introduced by the birds!

This plant has appeared this year and had small white flowers followed in early Autumn with Red Chinese Lantern type seed pods!
As it had 'sowed itself' where I did not want it, I had moved it into a pot during early summer. It was when I moved it that I noticed some long runner type roots!
So I would also like to know if it has invasive tendencies?

If any problem in identification, I could take & upload a photo . .

 

Definitely a photo would help @David E Peacock . Ideally good to have photo of all plant plus close up of leaves and flowers, flowers presumably will no longer be available but take photo of seed pods. While I may well not be able to identify your plant even with photos the likes of Silver Surfer will no doubt give you the answer. She is totally amazing when it comes to identifying plants.

 

Is it possibly Physalis alkekengi..white flowers, red chinese lantern seed pods...roots that run!?

https://www.google.co.uk/search?q=p...ved=0ahUKEwiA3arl3rnQAhXFCsAKHcxkDUwQ_AUIBigB

https://www.google.co.uk/search?q=c...37nQAhUHJsAKHRraCcEQ_AUICCgB&biw=1536&bih=731

Many thanks silu for your very generous comments.
Above thoughts may be miles out...if so definitely need a photo or two!

 

If it is a Chinese Lantern, there are both edible and poisonous ones

 

@Silver surfer
Thanks for that, you are spot on with Physalis alkekengi.

Hopefully the weather will allow me to take a photo tomorrow, todays monsoon has prevented me from doing that . . .
Will post a photo to make sure . .

 

Further to my earlier message, photo's of the plant attached as requested.
I am also looking for confirmation that this plant is invasive?

Thanks for your comments

 

Confirmed as Physalis alkekengi.
Hmm! Rather depends on how much space you have.
It does spread but it is a plant I love.Really colourful at this time of year.
It is easy enough to remove if it should get too big.

 

As per the norm @Silver surfer, if Mastermind was still on the go my money would be on you! Well done. Just as an aside I was put off suggesting to David Peacock that his plant was a Chinese Lantern as I did grow some years ago and could have sworn mine had lavender coloured flowers.