It looks like Lily Allen and ex-boyfriend Ed Simons may be putting their recent split behind them and giving their relationship another try.

The Smile singer, 22, was spotted at the Chemical Brothers DJ's west London home on Saturday and Sunday, despite splitting last month.

Allen fuelled reports she is back together with Simons after she was photographed with a ring on her engagement finger as she left his Notting Hill home on Sunday afternoon.

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Contemplation: Lily Allen looks deep in thought as she leaves Ed Simons' London home yesterday clutching her new MacBook Air and flashing a ring on her engagement finger

The previous day, Allen was spotted being dropped off in central London by Simons - but with the ring on her middle finger.

After spending the week glamming it up as she joined her famous friends Kelly Osbourne, Alexa Cheung, Kimberly Stewart and Jaime Winstone at London Fashion Week parties, Allen had a low-key weekend dressed down with Simons.

In contrast to the vampish red dress she wore on Valentine's Day, Allen sported a baggy grey dress and black satin jacket as she wrapped up against the chilly weekend weather.

Simons, 37, was reported to have dumped Allen at the end of January, just two weeks after they confirmed reports the singer had suffered a miscarriage.

Just before their split, the couple had gone on a luxury holiday to the Maldives, where they stayed in a £3,000-a-night five star hotel.

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Taking it easy: Allen spent the weekend dressed down after a week of hard-partying with her girlfriends at London Fashion Week

The couple started dating last September - just weeks after Allen split from long-term love, record company executive Seb Chew.

They announced Allen was expecting in December, but admitted she was in the "very, very early" stages of pregnancy.

Writing on her MySpace blog last week, Allen admitted she'd had a tough 2008 so far, but was optimistic about the future.

She revealed she had bought herself a new car in a bid to cheer herself up and also received a brand-new MacBook Air laptop after attending a Vanity Fair party at London's National Portrait Gallery.

She said: "I went to a fashion show this morning and saw some old friends, which was nice, I have been venturing out the last week or so, trying to get back to normality after what has been a rocky start to the year.

"One last bit of exciting news, I have been miserable lately so I bought myself a new car. It may arrive by the end of the week so something to look forward to.

"Life is funny isn't it? To think that a Mac Book or a car is going to be the thing to make you feel better. Something will, soon I hope."

Happier times: Lily Allen and Ed pictured in December, the same month they announced her pregnancy