This social services storyline is unrealistic from the perspective of the attitude of the social worker, and the general procedure process. However, it isn't on Phil getting custody of Lexi. Here's why;
- Phil's done various bad things - I don't really need to go into the numerous bad things, he's done, but he's not been convicted of 95% of these things; and as such they aren't on his record. Phil's abuse of Ben isn't on record for instance - social services were only involved in regard to the establishment of custody, of Louise a few years ago (and Ben I think in 2006 as well). The last time Phil was actually convicted of anything serious was in 2003 when Den framed him for army robbery, and Phil and Grant I think managed to convince the 'witness' in the crime to withdraw their statement, thus his conviction was overturned on appeal. Indeed, I don't think Phil has any serious convictions on his record for twenty years, now.
- The only thing that would be on record is Phil's history with alcohol, through his AA classes - and his recent relapses this year no one but people like Sharon, and Shirley know about. The latter isn't in the square at the moment, and Sharon is hardly going to tell anyone about it.
- Lola, unlike Phil has fairly recent convictions, and Billy has a precarious situation regarding his employment, which has been a long term issue for him – social services will have information Billy’s employment his via his fostering of Jay. Phil, by contrast has a stable situation regarding income coming in - any dirty dealings he may have done in the past aren't on his record. Phil's home environment will also be a plus in comparisons to Billy, in regard to its condition; the place is fairly clean and spacious. By contrast, Billy and Lola live in a dark, unclean basement flat which likely has two bedrooms at most.
- Phil, as pointed out before, also has the money to get good lawyers, who probably know the social services system inside out as they've dealt with it through Ben and Louise respectively - so Phil knows about getting custody of children. Plus, when Phil gets Sharon involved, it'll look like Sharon can be a mother figure to help support a young teenager mother like Lola in caring for Lexi, as someone who already has a young son - it will add to the image of stability, as well, as Sharon has no convictions and has a stable source of employment. So, there will be three people in the home to help care for Lexi.
In light of that, it's no wonder Phil does get custody of Lexi, although I doubt Phil will 'take away' Lexi from Lola. What this storyline, is enabling is the re-establishment of a family for Phil for the millionth time. As such, it's pretty much odds on Lola will move in with Phil to care for Lexi, and Billy will lose both Lola and Lexi. Thus, the scenes we're seeing on screen now are a foreshadowing of the growing tension between Billy and Phil, viewers will see at Xmas (Perry Fenwick said so in an interview about two months ago).