Brilliant; thank you very much.
For others who received rights issue email from linkintime, follow the link they sent in the email and first check your allotment. you will need your DP and pan card details. After that, on the same page confusingly they have a pay and download option. Choose pay and follow the 3 step part to verify, add bank details and finally pay by UPI. Use the same a/c that is linked to your demat/trading acct. So you need your acct nbr,IFSC code as usual.
The form doesnt seem to work for me in IE, so if you get strange or blank dropdown options switch to FFox.
HTH