Ipad 2 with latest software...

Slow...sluggish

Any ideas? Done a re-installation - no good.

16GB with 5GB Free space

The iPad 2 is very old now. It should be better on iOS 9 than 8.

What is slow? Safari? Try this:
Go to settings, Safar, turn off Safari suggestions.

Thanks for your reply. Yes safari and some of the apps. It freezes as well

Some people have found that a backup, erase and restore helps.

I am finding the same with my ipad2, with both ios 9.2 and 9.3. I am really thinking it may be time to upgrade.