UK Telephone numbers. Selecting, sorting and formatting

The UK has landlines in the format 01xxx xxxxxx and citys have 01xx xxx xxxx
Mobiles are always 07xxx xxxxxx

I have a corrupted csv from my iphone and the numbers are sometimes in the wrong format or the wrong column ie mobiles in home number and landlines in mobile number.

I have over 1000 contacts and I'm doing this manually.

There must be a better way???

TIA