Hello there! This is my first venture into the wonderland of Mary Poppins. Which is why it is so short, sorry! So, thanks for clicking! This was just an idea that was floating around in my head and interfering with my study, so I merely wrote it down. Which pretty much explains why it is all fluff and spoon-fulls of sugar. Feel free to review, by the way.
And I'm sorry if I mess up Bert's fantastic accent.

Disclaimer: I'm just borrowing the characters, sadly.

Midnight on the Rooftops

Mary Poppins adjusted her hat as she sat on the rooftop. The wind gently blew a stray lock of hair around.

She crossly tucked it behind her ear.

There were some scuffling noises behind her, and as she turned her head, there was an 'Oof!' and Bert clambered out of the chimney, dusting his sooty hands on his trousers.

"Bert!" said Mary, getting to her feet. "You do look a Frightful Mess." she scolded.

Bert grinned.

"Hello, Mary." he said, smiling. "Beautiful night, innit?"

He took her hand and kissed it like a gentleman.

She blushed.

Together they sat down on the roof, looking out over the smoggy view.

"So, Bert, what makes you ask me to the roof at this hour of night?" Mary asked, half stern, half shyly.

He looked into her sapphire-blue eyes and said softly, "Well, you're going soon, ain't you? The wind's 'bout to change."

She said nothing, but a look passed between them that confirmed what he was dreading.

"Bert, you mustn't be so silly as to think I'm never coming back." she said, more aloofly than she felt.

He sighed.

"Mary Poppins, you're my best friend in the 'ole wide world. Who knows how long it's gonna be 'till you come back? You know I miss you when you ain't here. If I didn't know you better then I'd say you miss me too. And when you is here, you're lookin' after charges, so there ain't no time 'cept for your Days Off for us to spend tog'ther." he explained, almost hurriedly.

Mary said nothing, but her mouth softened with the ghost of a smile.

"Well, Bert, since you have me up on this roof at this ridiculous hour, what are we to do?" she asked eventually, smiling lightly at him.

He jumped to his feet. "Well, Miss Poppins, now that I 'ave your und'ivided attention, I was 'oping to ask, would you do me the pleasure of a Dance?"

He held out his hand.

She took it, eyes sparkling in the faint moonlight. "Oh, Bert!" she said as he twirled her around gently. "You are ridiculously childish, aren't you?"

He grinned, dimples crinkling around the corners of his mouth. "An' proud of it, Mary."

She laughed.

The night grew old and the sun prepared to rise as they danced on the rooftops, the only sounds the clicking of their shoes on the tiles and the slight whistle of the wind as it blew over the chimneys.