403 error changing from index.php to index.html

Hi

I am updating a friends website and the initial page is changing from index.php to index.html. After uploading the new pages including the index.html I get the following error

You don’t have permission to access /index.html on this server.

Apache/2.4.7 (Ubuntu) Server

Can you please advise me on how I can change this.

Many thanks

What are the permissions on the file index.html?

the permssions are read and write unix equivalent 600. However I think it has something to do with the .ht file. I opened it up but it is just differnt numbers and letters. nothing about the index.php file. I never have a problem with index.html files when uploading via ftp

The problem is 600. Apache can’t read the file, give it 644.

This doesn’t make sense at all, what are you trying to say here?

I’m guessing the file path is set to be index.php. If this is the case I don’t know where to look to change it? any advise much appreciated!
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Sorry, I was comparing the .ht file to a different .htaccess file and it did not read like a .htaccess file. I am a newbie with servers and settings. I just do the front end stuff so apologies for not making sense. I will change the 600 thankyou
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that worked! many thanks for your speedy advise apologies again for my ‘assumptions’ on how things might or might not work. thank you