extracted from IG help center:
Rights issue example
A company you have a long position on offers a rights issue, allowing you to buy five shares at 20p for every one share you already own. On the ex-date, your position is equivalent to owning ten shares.
We’ll open a new position worth 50 shares, leaving your original position unaffected. If you decide to take up the offer, you’ll get 50 new shares at a level of 20p per share.
I don't understand the part that "you will get 50 shares at 20p"
Does it mean I receive the underlying shares?
How do I sell these shares that i received?